Add return statement to a test class's assignment operator. Defect found by Coverity Scan.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@216317 91177308-0d34-0410-b5e6-96231b3b80d8
Fix assignments that should be comparisons x3

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@216318 91177308-0d34-0410-b5e6-96231b3b80d8
Merge branch 'master' of http://llvm.org/git/libcxx
fix unit