Added f and m flags to be ignored. These will not display a warning. The revision
for this patch is here: http://reviews.llvm.org/D4570. This will help with the
rebuild of Debian with clang. Here is a link to the errors that Debian is
experiencing: http://clang.debian.net/status.php?version=3.4.2&key=UNKNOWN_ARG


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@214907 91177308-0d34-0410-b5e6-96231b3b80d8