[Driver/Unittests] Follow up for r212666, add unit test for the newly exposed getARMCPUForMArch() function.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@212751 91177308-0d34-0410-b5e6-96231b3b80d8
Quick (attempted) fix for non-asserts builds for a test introduced in r212743.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@212752 91177308-0d34-0410-b5e6-96231b3b80d8
Avoid definining more GCC specific predefined macros in clang-cl

Reviewers: hansw, rnk

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D4419

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@212753 91177308-0d34-0410-b5e6-96231b3b80d8
Remove use of uniform initialization ({}) introduced in r212725 since this isn't supported in MSVC.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@212754 91177308-0d34-0410-b5e6-96231b3b80d8