Fix tests to be more specific.

Fix tests to be more specific.
The environments can inject some declaration in every translation unit,
which can match very generic matchers, thus failing the tests.

Summary:
Fix tests to be more specific.
The environments can inject some declaration in every translation unit,
which can match very generic matchers, thus failing the tests.

Reviewers: aaron.ballman

CC: klimek, cfe-commits, revane
Differential Revision: http://llvm-reviews.chandlerc.com/D1541

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189587 91177308-0d34-0410-b5e6-96231b3b80d8