e_server: move wl_global initialization to e_server

e_server: move wl_global initialization to e_server

Calling init function which initialize the wl_globals move
from e_comp_wl_init() to e_server_init(). e_server registers
the server features and this lets other module in e20 know
which wayland global resource is supported.

Change-Id: I5a2833c3b2e3df7c5f094bc7500fac82a7037834