Merge pull request dotnet/core-setup#3375 from dotnet-maestro-bot/master-UpdateDepend...
authorEric Erhardt <eric.erhardt@microsoft.com>
Tue, 31 Oct 2017 20:04:37 +0000 (15:04 -0500)
committerGitHub <noreply@github.com>
Tue, 31 Oct 2017 20:04:37 +0000 (15:04 -0500)
Update BuildTools, WCF to prerelease-02131-02, preview2-25831-02, respectively (master)

Commit migrated from https://github.com/dotnet/core-setup/commit/01875d5c8660ed242c22801024c88621067bd4d7


Trivial merge