clang/test/Index/annotate-comments-typedef.m: Remove CommentXMLValid in CHECKs. Don't assume libxml2 here.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173534 91177308-0d34-0410-b5e6-96231b3b80d8
patch for PR9027 and // rdar://11861085
Title: [PR9027] volatile struct bug: member is not loaded at -O;
This is caused by last flag passed to @llvm.memcpy being false, 
not honoring that aggregate has at least one 'volatile' data member 
(even though aggregate itself has not been qualified as 'volatile'. 
As a result, optimization optimizes away the memcpy altogether.
Patch review by John MaCall (I still need to fix up a test though).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173535 91177308-0d34-0410-b5e6-96231b3b80d8