Summary:
Set xkb context and keymap to Ecore_Drm.
In enlightenment (used in wayland with drm backend), keymap is used only one.
So for avoid unnecessary open keymap files, set cached context and keymap.
But for this, enlightenment must compile keymap before init ecore_drm.
So I changed booting sequence also.
Test Plan: Distinguish time between before and after during add a keyboard device.
Reviewers: raster, devilhorns, zmike
Subscribers: cedric, input.hacker, ohduna
Differential Revision: https://phab.enlightenment.org/D3504
bdb462e19f
