Merge pull request dotnet/core-setup#3509 from dotnet-maestro-bot/master-UpdateDepend...
authorWes Haggard <weshaggard@users.noreply.github.com>
Tue, 12 Dec 2017 16:53:20 +0000 (08:53 -0800)
committerGitHub <noreply@github.com>
Tue, 12 Dec 2017 16:53:20 +0000 (08:53 -0800)
Update BuildTools, WCF to prerelease-02312-01, preview2-26012-01, respectively (master)

Commit migrated from https://github.com/dotnet/core-setup/commit/e8c5cade4e2b33262ef576f13e6a02af761a816f


Trivial merge