nbd: use new style hook

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/nbd/nbd.mk

@@ -10,13 +10,17 @@ NBD_SITE=http://$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/sourceforge/nbd/
 NBD_CONF_OPT = $(if $(BR2_LARGEFILE),--enable-lfs,--disable-lfs)
 NBD_DEPENDENCIES = libglib2
 
-$(eval $(call AUTOTARGETS,package,nbd))
-
-$(NBD_HOOK_POST_INSTALL): $(NBD_TARGET_INSTALL_TARGET)
 ifneq ($(BR2_NBD_CLIENT),y)
-	rm -f $(TARGET_DIR)/usr/sbin/nbd-client
+	NBD_TOREMOVE += nbd-client
 endif
 ifneq ($(BR2_NBD_SERVER),y)
-	rm -f $(TARGET_DIR)/usr/bin/nbd-server
+	NBD_TOREMOVE += nbd-server
 endif
-	touch $@
+
+define NBD_CLEANUP_AFTER_INSTALL
+	rm -f $(addprefix $(TARGET_DIR)/usr/sbin/, $(NBD_TOREMOVE))
+endef
+
+NBD_POST_INSTALL_TARGET_HOOKS += NBD_CLEANUP_AFTER_INSTALL
+
+$(eval $(call AUTOTARGETS,package,nbd))