Add testcases for -fparse-all-comments


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179181 91177308-0d34-0410-b5e6-96231b3b80d8
[ms-inline asm] Add a few test cases that were regressed by r179115.  That
commit was reverted in r179120, but I do plan on reapplying with a fix shortly.
Part of rdar://13611297


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179182 91177308-0d34-0410-b5e6-96231b3b80d8