Suppress asan stage2 test failures on the sanitizer-bootstrap bot.

Some of the asan lit tests are failing when run in UAR mode.
https://code.google.com/p/address-sanitizer/issues/detail?id=358


git-svn-id: https://llvm.org/svn/llvm-project/zorg/trunk@222880 91177308-0d34-0410-b5e6-96231b3b80d8
Really disable ASan-UAR on the sanitizer bootstrap bot.

r222880 did not do anything because ASan option parser is a huge mess.


git-svn-id: https://llvm.org/svn/llvm-project/zorg/trunk@222881 91177308-0d34-0410-b5e6-96231b3b80d8