Changes to kernel buildbot:
- Rename builder to kasan-x86-64
- Support multiple test runs
- Fail if no tests were run


git-svn-id: http://address-sanitizer.googlecode.com/svn/trunk@2263 3c3640eb-14a6-2bb8-0b94-e9e73afe33f5
Use released GCC 4.9.2


git-svn-id: http://address-sanitizer.googlecode.com/svn/trunk@2264 3c3640eb-14a6-2bb8-0b94-e9e73afe33f5