Merge efreet_mime efreet_trash into efreet

Merge efreet_mime efreet_trash into efreet

efreet_mime and efreet_trash are now included in libefreet.so. There are
compatible libs for libefreet_mime.so libefreet_trash.so, which simple
drag in libefreet.so. .pc files also are in place for compatibility.

efreet_init & shutdown now initializes and shutdowns trash and mime.
The old init functions now simply call efreet_init, efreet_init will
then init the trash or mime libs.

Reviewed-by: Stefan Schmidt <stefan@datenfreihafen.org>
Differential Revision: https://phab.enlightenment.org/D11807