Merge pull request dotnet/core-setup#4065 from jcagme/master
authorJC Aguilera <juanam@microsoft.com>
Mon, 30 Apr 2018 16:16:45 +0000 (09:16 -0700)
committerGitHub <noreply@github.com>
Mon, 30 Apr 2018 16:16:45 +0000 (09:16 -0700)
Adding Begin and End scripts to build defs

Commit migrated from https://github.com/dotnet/core-setup/commit/0fab15996fb604e15378d7236f3ce954cb9d272d


Trivial merge