efl: explicitly depend on lua5.1

* even with luajit in DEPENDS, old lua5.1. was referenced from pkg-config
  and other recipes were failing when trying to use edje without lua5.1
  in sysroot, e.g. cpu, e-tasks, e-wm, e-wm-config-illume2-shr, diskio

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>