Summary: With a growing suite of comment-related tests, it makes sense to take them out of the main test file. No functional changes.

Reviewers: djasper

Reviewed By: djasper

Subscribers: cfe-commits, klimek, mgorny

Differential Revision: https://reviews.llvm.org/D29713

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@294439 91177308-0d34-0410-b5e6-96231b3b80d8