kbuild: clean Module.markers and modules.order for out-of-tree modules

Signed-off-by: Frédéric Brière <fbriere@fbriere.net>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Makefile

diff --git a/Makefile b/Makefile
index eb38c83..b309fca 100644
--- a/Makefile
+++ b/Makefile
@@ -1421,7 +1421,9 @@
 	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 
 clean:	rm-dirs := $(MODVERDIR)
-clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
+clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
+                   $(KBUILD_EXTMOD)/Module.markers \
+                   $(KBUILD_EXTMOD)/modules.order
 clean: $(clean-dirs)
 	$(call cmd,rmdirs)
 	$(call cmd,rmfiles)