[tsan] Fix more warnings in TSan tests.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@204715 91177308-0d34-0410-b5e6-96231b3b80d8
[msan] Enable SelectPartial test.

Fixed in r204716.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@204717 91177308-0d34-0410-b5e6-96231b3b80d8