Merge pull request dotnet/coreclr#4637 from adityamandaleeka/synch_cleanup
authorAditya Mandaleeka <adityamandaleeka@users.noreply.github.com>
Mon, 2 May 2016 18:53:13 +0000 (11:53 -0700)
committerAditya Mandaleeka <adityamandaleeka@users.noreply.github.com>
Mon, 2 May 2016 18:53:13 +0000 (11:53 -0700)
Remove SYNCHMGR_PIPE_BASED_THREAD_BLOCKING and clean up synchmanager

Commit migrated from https://github.com/dotnet/coreclr/commit/ede2e6e2677ea633311d9041516e16a0ee6fc33c


Trivial merge