Merge pull request dotnet/core-setup#3515 from dotnet-maestro-bot/master-UpdateDepend...
authorAhson Khan <ahkha@microsoft.com>
Wed, 13 Dec 2017 03:53:26 +0000 (19:53 -0800)
committerGitHub <noreply@github.com>
Wed, 13 Dec 2017 03:53:26 +0000 (19:53 -0800)
Update BuildTools, CoreClr, CoreFx to prerelease-02312-02, preview1-26013-01, preview1-26012-03, respectively (master)

Commit migrated from https://github.com/dotnet/core-setup/commit/a010a1c36170503bc4dcefb1b0a60eb0012d9d32


Trivial merge