Move Android bot to standalone build.

I'm switching all Android build steps to warnings-only mode until it's stable.


git-svn-id: http://address-sanitizer.googlecode.com/svn/trunk@2137 3c3640eb-14a6-2bb8-0b94-e9e73afe33f5
fix compiler-rt path 


git-svn-id: http://address-sanitizer.googlecode.com/svn/trunk@2138 3c3640eb-14a6-2bb8-0b94-e9e73afe33f5