Remove distinction between Apple/Linux for Process run locks:
- Played with the current dual run lock implementation for a few days, noticed
  no regressions, so enabling in trunk so we see if any problems are detected
  by buildbots.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@181446 91177308-0d34-0410-b5e6-96231b3b80d8