Fix more Intel syntax issues with FP instruction aliases. Test cases coming in a subsequent patch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187187 91177308-0d34-0410-b5e6-96231b3b80d8
Add test cases for the various instruction alias and Intel syntax fixes that have gone in lately.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187188 91177308-0d34-0410-b5e6-96231b3b80d8