patch.bbclass: Fix force options for recent quilt versions

git-svn-id: https://svn.o-hand.com/repos/poky/trunk@1122 311d38ba-8fff-0310-9ca6-ca027cbcb966

meta/classes/patch.bbclass

@@ -229,6 +229,7 @@ def patch_init(d):
 			args = ["import", "-p", patch["strippath"]]
 			if force:
 				args.append("-f")
+				args.append("-dn")
 			args.append(patch["file"])
 
 			self._runcmd(args)