Kbuild: Fix to distclean target.

This commit fixes the distclean target.
distclean target removes the hidden files, with cmd extension,
generated by Kbuild.

Change-Id: If00c9b0ee9791abb64e29f8a9ebda454384f23af
Signed-off-by: Juan Manuel Cruz <[email protected]>

Author: jmcruzal

Makefile.inc

@@ -45,6 +45,7 @@ cmd_clean_inner_files = \
 clean: FORCE
 	@rm $(SOURCE_DIR)$(rm-objects) -f
 	@rm $(SOURCE_DIR)/modules.order -f
+	@rm $(SOURCE_DIR)/.*.cmd -f
 	$(call cmd_clean_inner_files)
 
 pristine: distclean