Merge pull request dotnet/coreclr#10907 from wtgodbe/BuildTypeReporting2
authorWilliam Godbe <wigodbe@microsoft.com>
Wed, 12 Apr 2017 00:03:05 +0000 (17:03 -0700)
committerGitHub <noreply@github.com>
Wed, 12 Apr 2017 00:03:05 +0000 (17:03 -0700)
Pass null instead of empty for PB_BuildType

Commit migrated from https://github.com/dotnet/coreclr/commit/79727651f0cab62c46cb1fe34e12f2122d6d554c


Trivial merge