Control 'invalid conversion specifier' warnings under a subflag (-Wformat-invalid-specifier) of -Wformat.  Fixes <rdar://problem/10031930>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@138686 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed