buildman: Add an option to ignore migration warnings
These are becoming more common now. They cause boards to show warnings
which can be mistaking for compiler warnings.
Add a buildman option to ignore them. This option works only with the
summary option (-s). It does not affect the build process.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/buildman/README b/tools/buildman/README
index 0663ec3..fe76d4c 100644
--- a/tools/buildman/README
+++ b/tools/buildman/README
@@ -1125,7 +1125,7 @@
If there are both warnings and errors, errors win, so buildman returns 128.
The -y option is provided (for use with -s) to ignore the bountiful device-tree
-warnings.
+warnings. Similarly, -Y tells buildman to ignore the migration warnings.
How to change from MAKEALL