Makefile: remove guestfs dir on make mrproper

The guestfs directory can safely be removed if a user
uses 'make mrproper' so just nuke it.

Signed-off-by: Luis Chamberlain <[email protected]>

Author: mcgrof

Makefile

@@ -257,6 +257,7 @@ mrproper:
 	$(Q)rm -f .config .config.old extra_vars.yaml $(KCONFIG_YAMLCFG)
 	$(Q)rm -f playbooks/secret.yml $(KDEVOPS_EXTRA_ADDON_DEST)
 	$(Q)rm -rf include
+	$(Q)rm -rf guestfs
 
 kconfig-help-menu:
 	$(Q)$(MAKE) -s -C scripts/kconfig help