Merge pull request dotnet/coreclr#21386 from briansull/issue_19925
authorBrian Sullivan <briansul@microsoft.com>
Tue, 11 Dec 2018 01:24:10 +0000 (17:24 -0800)
committerGitHub <noreply@github.com>
Tue, 11 Dec 2018 01:24:10 +0000 (17:24 -0800)
Preserve the exception sets from child nodes when we create a new unique value number

Commit migrated from https://github.com/dotnet/coreclr/commit/335804f565c0bb18792b7097b3a1258f6cf5224a


Trivial merge