kconfig infra: remove all install stamp files

Some packages (like linux) may install things inside images/ as well, so
remove the associated stamp file after running the configuration editor.

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: "Yann E. Morin" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/pkg-kconfig.mk

@@ -71,7 +71,7 @@ $$(addprefix $(1)-,$$($(2)_KCONFIG_EDITORS)): $$($(2)_DIR)/.stamp_kconfig_fixup_
 	$$($(2)_MAKE_ENV) $$(MAKE) -C $$($(2)_DIR) \
 		$$($(2)_KCONFIG_OPTS) $$(subst $(1)-,,$$@)
 	rm -f $$($(2)_DIR)/.stamp_{kconfig_fixup_done,configured,built}
-	rm -f $$($(2)_DIR)/.stamp_{target,staging}_installed
+	rm -f $$($(2)_DIR)/.stamp_{target,staging,images}_installed
 
 $(1)-savedefconfig: $$($(2)_DIR)/.stamp_kconfig_fixup_done
 	$$($(2)_MAKE_ENV) $$(MAKE) -C $$($(2)_DIR) \