Update compile script

a). sync build script from g12a repo
b). sync tools with trunk
c). add txhd support

Change-Id: Id47b48711cdfe2371b047ad3203327eb28a29f9c
diff --git a/build_bl40.sh b/build_bl40.sh
new file mode 100755
index 0000000..5022c19
--- /dev/null
+++ b/build_bl40.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+function build_bl40() {
+	echo -n "Build bl40...Please wait... "
+	# $1: src_folder, $2: bin_folder, $3: soc
+	cd $1
+	# todo
+	cd ${MAIN_FOLDER}
+	echo "done"
+	return
+}