Reverted r224726. This patch requires more work than I expected.

git-svn-id: https://llvm.org/svn/llvm-project/zorg/trunk@224731 91177308-0d34-0410-b5e6-96231b3b80d8
Add missing -w in ASan builds.

git-svn-id: https://llvm.org/svn/llvm-project/zorg/trunk@224732 91177308-0d34-0410-b5e6-96231b3b80d8