Treat [[gnu::__const]] the same as [[gnu::const]]. GCC's tokenizer can't tell
the difference.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193582 91177308-0d34-0410-b5e6-96231b3b80d8
Add missing attributes [[gnu::no_sanitize_address]] and
[[gnu::no_address_safety_analysis]].


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193583 91177308-0d34-0410-b5e6-96231b3b80d8