This tests the ARM64 specific constants added in SVN r309081,
similar to the one added in r277928 for armintr.h.

Differential Revision: https://reviews.llvm.org/D35934

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@309314 91177308-0d34-0410-b5e6-96231b3b80d8