Merge pull request dotnet/corefx#24881 from stephentoub/port_channels
authorStephen Toub <stoub@microsoft.com>
Thu, 26 Oct 2017 16:40:28 +0000 (12:40 -0400)
committerGitHub <noreply@github.com>
Thu, 26 Oct 2017 16:40:28 +0000 (12:40 -0400)
Add System.Threading.Channels to corefx

Commit migrated from https://github.com/dotnet/corefx/commit/f2600077158312adf605bc58d08a48a1e259b738


Trivial merge