SupportTests.LockFileManagerTest: Add assertions for Win32.

  - create_link doesn't work for nonexistent file.
  - remove cannot remove working directory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204579 91177308-0d34-0410-b5e6-96231b3b80d8
InstrProf: Silence spurious warnings in GCC 4.8

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204580 91177308-0d34-0410-b5e6-96231b3b80d8