Merge pull request dotnet/coreclr#11047 from stephentoub/task_iscompletedsuccessfully
authorStephen Toub <stoub@microsoft.com>
Tue, 18 Apr 2017 20:43:53 +0000 (16:43 -0400)
committerGitHub <noreply@github.com>
Tue, 18 Apr 2017 20:43:53 +0000 (16:43 -0400)
Expose Task.IsCompletedSuccessfully

Commit migrated from https://github.com/dotnet/coreclr/commit/0623eb3c85078d84284e5c75eab1ce978ede62f7


Trivial merge