AVX-512: I added new headers to makefiles. It should resolve tests fail.
If it will not, I'm reverting the both commits.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213645 91177308-0d34-0410-b5e6-96231b3b80d8
[OPENMP] Tests for nesting of regions for 'atomic' directive.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213648 91177308-0d34-0410-b5e6-96231b3b80d8
Disallowing GNU-style attributes in new expressions, since they are prohibited by GCC as well.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213650 91177308-0d34-0410-b5e6-96231b3b80d8