objc QOI: Don't't warn about mismatch between attributes 
on method declaration and definition if former is in
a system header. // rdar://10580333


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147020 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed