buildman: Avoid using board as a variable

We have a module called 'board'. Sometimes buildman uses 'brd' as an
instance variable but sometimes it uses 'board', which is confusing and
can mess with the module handling. Update the code to use 'brd'
consistently, making it easier for tools to determine when the module
is being referenced.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/buildman/builder.py b/tools/buildman/builder.py
index 078ddf0..462266b 100644
--- a/tools/buildman/builder.py
+++ b/tools/buildman/builder.py
@@ -875,11 +875,11 @@
         config = {}
         environment = {}
 
-        for board in boards_selected.values():
-            outcome = self.GetBuildOutcome(commit_upto, board.target,
+        for brd in boards_selected.values():
+            outcome = self.GetBuildOutcome(commit_upto, brd.target,
                                            read_func_sizes, read_config,
                                            read_environment)
-            board_dict[board.target] = outcome
+            board_dict[brd.target] = outcome
             last_func = None
             last_was_warning = False
             for line in outcome.err_lines:
@@ -894,29 +894,29 @@
                         if is_warning or (last_was_warning and is_note):
                             if last_func:
                                 AddLine(warn_lines_summary, warn_lines_boards,
-                                        last_func, board)
+                                        last_func, brd)
                             AddLine(warn_lines_summary, warn_lines_boards,
-                                    line, board)
+                                    line, brd)
                         else:
                             if last_func:
                                 AddLine(err_lines_summary, err_lines_boards,
-                                        last_func, board)
+                                        last_func, brd)
                             AddLine(err_lines_summary, err_lines_boards,
-                                    line, board)
+                                    line, brd)
                         last_was_warning = is_warning
                         last_func = None
-            tconfig = Config(self.config_filenames, board.target)
+            tconfig = Config(self.config_filenames, brd.target)
             for fname in self.config_filenames:
                 if outcome.config:
                     for key, value in outcome.config[fname].items():
                         tconfig.Add(fname, key, value)
-            config[board.target] = tconfig
+            config[brd.target] = tconfig
 
-            tenvironment = Environment(board.target)
+            tenvironment = Environment(brd.target)
             if outcome.environment:
                 for key, value in outcome.environment.items():
                     tenvironment.Add(key, value)
-            environment[board.target] = tenvironment
+            environment[brd.target] = tenvironment
 
         return (board_dict, err_lines_summary, err_lines_boards,
                 warn_lines_summary, warn_lines_boards, config, environment)
@@ -971,9 +971,8 @@
                 board.target
         """
         self._base_board_dict = {}
-        for board in board_selected:
-            self._base_board_dict[board] = Builder.Outcome(0, [], [], {}, {},
-                                                           {})
+        for brd in board_selected:
+            self._base_board_dict[brd] = Builder.Outcome(0, [], [], {}, {}, {})
         self._base_err_lines = []
         self._base_warn_lines = []
         self._base_err_line_boards = {}
@@ -1220,10 +1219,10 @@
             boards = []
             board_set = set()
             if self._list_error_boards:
-                for board in line_boards[line]:
-                    if not board in board_set:
-                        boards.append(board)
-                        board_set.add(board)
+                for brd in line_boards[line]:
+                    if not brd in board_set:
+                        boards.append(brd)
+                        board_set.add(brd)
             return boards
 
         def _CalcErrorDelta(base_lines, base_line_boards, lines, line_boards,
@@ -1328,7 +1327,7 @@
                 out_list = []
                 for line in err_lines:
                     boards = ''
-                    names = [board.target for board in line.boards]
+                    names = [brd.target for brd in line.boards]
                     board_str = ' '.join(names) if names else ''
                     if board_str:
                         out = self.col.build(colour, line.char + '(')
@@ -1549,9 +1548,9 @@
 
         # Get a list of boards that did not get built, if needed
         not_built = []
-        for board in board_selected:
-            if not board in board_dict:
-                not_built.append(board)
+        for brd in board_selected:
+            if not brd in board_dict:
+                not_built.append(brd)
         if not_built:
             tprint("Boards not built (%d): %s" % (len(not_built),
                   ', '.join(not_built)))
@@ -1768,7 +1767,7 @@
         # Create jobs to build all commits for each board
         for brd in board_selected.values():
             job = builderthread.BuilderJob()
-            job.board = brd
+            job.brd = brd
             job.commits = commits
             job.keep_outputs = keep_outputs
             job.work_in_output = self.work_in_output