Temporary disable -Wnested-anon-types warning that breaks self-hosted compilation with Werror

git-svn-id: http://address-sanitizer.googlecode.com/svn/trunk@1579 3c3640eb-14a6-2bb8-0b94-e9e73afe33f5
fix-up for r1579: remove quotes

git-svn-id: http://address-sanitizer.googlecode.com/svn/trunk@1581 3c3640eb-14a6-2bb8-0b94-e9e73afe33f5