Merge pull request dotnet/core-setup#4547 from dotnet-maestro-bot/master-UpdateDepend...
authorMatt Mitchell <mmitche@microsoft.com>
Wed, 12 Sep 2018 20:16:49 +0000 (13:16 -0700)
committerGitHub <noreply@github.com>
Wed, 12 Sep 2018 20:16:49 +0000 (13:16 -0700)
Update BuildTools, CoreClr, CoreFx to preview1-03211-01, preview1-26912-04, preview1-26912-03, respectively (master)

Commit migrated from https://github.com/dotnet/core-setup/commit/a46fb2af2401d45b4c7785a7bc3cb57365d531eb


Trivial merge