ccc: Support long ('--...') flag arguments.
 - Curiously, a number of the current translations gcc does appear to
   be useless?


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62831 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/ccc/ccclib/Driver.py b/tools/ccc/ccclib/Driver.py
index 2ba1cf6..9a393f1 100644
--- a/tools/ccc/ccclib/Driver.py
+++ b/tools/ccc/ccclib/Driver.py
@@ -313,6 +313,7 @@
 
         arg = (args.getLastArg(self.parser.dumpspecsOption) or
                args.getLastArg(self.parser.printMultiDirectoryOption) or
+               args.getLastArg(self.parser.printMultiOsDirectoryOption) or
                args.getLastArg(self.parser.printMultiLibOption))
         if arg:
             raise Arguments.InvalidArgumentsError('%s unsupported by this driver' % arg.opt.name)