Process and handle attributes on conditions and for loop variables. Process and
diagnose attributes on alias declarations, using directives, and attribute
declarations.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175649 91177308-0d34-0410-b5e6-96231b3b80d8
Attempt to clean up tests for non-X86 platforms.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175652 91177308-0d34-0410-b5e6-96231b3b80d8