[ASan] Fix GCD tests by spinning forever in the main thread. Since the error is always reported by one of the GCD workers, this will help avoid premature program termination with exit code 0.
[ASan] Fix GCD tests by spinning forever in the main thread.
Since the error is always reported by one of the GCD workers, this will help avoid premature program termination with exit code 0.


git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@191294 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt