Merge pull request dotnet/coreclr#8470 from brianrob/fix_lttng_header_detection
authorBrian Robbins <brianrob@microsoft.com>
Wed, 7 Dec 2016 05:14:38 +0000 (21:14 -0800)
committerGitHub <noreply@github.com>
Wed, 7 Dec 2016 05:14:38 +0000 (21:14 -0800)
Fix building against liblttng-ust-dev 2.8+

Commit migrated from https://github.com/dotnet/coreclr/commit/805363de5e8cdfa407a7fafcd4d53bb8733db887


Trivial merge