Merge pull request dotnet/coreclr#18887 from briansull/atomic-fix
authorBrian Sullivan <briansul@microsoft.com>
Fri, 13 Jul 2018 00:12:52 +0000 (17:12 -0700)
committerGitHub <noreply@github.com>
Fri, 13 Jul 2018 00:12:52 +0000 (17:12 -0700)
Include the processor atomic operations in the OperIsStore category

Commit migrated from https://github.com/dotnet/coreclr/commit/f3ab7e073a2c7720791b44638a99c43647da0a0a


Trivial merge