Driver: M and MM should be grouped together, <rdar://problem/8744831>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@121284 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index e4f807e..7674fdc 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -136,8 +136,7 @@
   Args.AddLastArg(CmdArgs, options::OPT_CC);
 
   // Handle dependency file generation.
-  if ((A = Args.getLastArg(options::OPT_M)) ||
-      (A = Args.getLastArg(options::OPT_MM)) ||
+  if ((A = Args.getLastArg(options::OPT_M, options::OPT_MM)) ||
       (A = Args.getLastArg(options::OPT_MD)) ||
       (A = Args.getLastArg(options::OPT_MMD))) {
     // Determine the output location.