Merge pull request dotnet/coreclr#5544 from vancem/EtwSessionFix
authorVance Morrison <vancem@microsoft.com>
Sat, 11 Jun 2016 19:37:08 +0000 (12:37 -0700)
committerGitHub <noreply@github.com>
Sat, 11 Jun 2016 19:37:08 +0000 (12:37 -0700)
Fix a problem where stale old, closed ETW sessions might be turned on.

Commit migrated from https://github.com/dotnet/coreclr/commit/1e54f44cc1736cea6c636f5138c733879d4dd1c2


Trivial merge