Make this test pass -verify.

Instead of using not, just drop the fastcall attribute which was causing
an warning:

calling convention 'fastcall' ignored for this target

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193110 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed