add convenience xbps php update script

dot_local/bin/executable_xxupdatephp

@@ -0,0 +1,4 @@
+#!/bin/bash
+xxautobump php8.{1,2,3}{-{apcu,ast,igbinary,imagick,mongodb,redis},} composer8.{1,2,3}
+git add .
+xbump :