Exclude several ASan tests from test suite if we're using GCC

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@209013 91177308-0d34-0410-b5e6-96231b3b80d8
[TSan] Improve support for running TSan test suite with GCC-TSan.

Test results with GCC-4.9.0: 78 expected passes, 74 unexpected failures.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@209014 91177308-0d34-0410-b5e6-96231b3b80d8