push llvm-symbolizer after remounting /system


git-svn-id: http://address-sanitizer.googlecode.com/svn/trunk@2224 3c3640eb-14a6-2bb8-0b94-e9e73afe33f5
Re-enable 2 build steps, disable running Android tests.

Should make the bot green for the weekend.


git-svn-id: http://address-sanitizer.googlecode.com/svn/trunk@2225 3c3640eb-14a6-2bb8-0b94-e9e73afe33f5