README: Fix typo; add link to testing docs

Signed-off-by: Bryce Harrington <b.harrington@samsung.com>
diff --git a/README b/README
index b3be4c9..3821e5d 100644
--- a/README
+++ b/README
@@ -11,5 +11,8 @@
 and can pull X clients into the Wayland desktop and act as a X window
 manager.
 
-Refer to http://wayland.freedesktop.org/building.html for buiding
+Refer to http://wayland.freedesktop.org/building.html for building
 weston and its dependencies.
+
+The test suite can be invoked via `make check`; see
+http://wayland.freedesktop.org/testing.html for additional details.