[TSan][libdispatch] Re-enable disabled tests

I re-activated "broad strokes suppressions"
(ignore_noninstrumented_modules=1) in my last commit. Re-enable tests
that only fail on our bots to check if they work now.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@358209 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed