e-comp-wl-input: don't leak the initial keymap.
e-comp-wl-input: don't leak the initial keymap.

Summary: remove xkb_map_ref() for keymap in _e_comp_wl_input_keymap_update().

Test Plan: N/A

Reviewers: devilhorns, zmike

Subscribers: ManMower, cedric

Differential Revision: https://phab.enlightenment.org/D3173

tasn/enlightenment,tizenorg/platform.upstream.enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,rvandegrift/e,rvandegrift/e,tasn/enlightenment,tasn/enlightenment