Merge pull request dotnet/corefx#24284 from joperezr/UpdateBuildTools
authorJose Perez Rodriguez <joperezr@microsoft.com>
Wed, 27 Sep 2017 21:25:38 +0000 (14:25 -0700)
committerGitHub <noreply@github.com>
Wed, 27 Sep 2017 21:25:38 +0000 (14:25 -0700)
Updating Buildtools to update Roslyn

Commit migrated from https://github.com/dotnet/corefx/commit/eb96cdac247febed3d5d10f93a6472419e1253c1


Trivial merge