udev: keyboard - also hook into "change" events

Re-apply the keymaps when "udevadm trigger" is called. Hooking into
"add" only would just remove all keymap content from the udev database
instead of applying the new config.

rules/60-keyboard.rules

@@ -1,6 +1,6 @@
 # do not edit this file, it will be overwritten on update
 
-ACTION!="add", GOTO="keyboard_end"
+ACTION=="remove", GOTO="keyboard_end"
 KERNEL!="event*", GOTO="keyboard_end"
 ENV{ID_INPUT_KEY}=="", GOTO="keyboard_end"