efl,elementary,emotion-generic-players,evas-generic-loaders: upgrade to 1.15.*

* announcements:
  https://phab.enlightenment.org/phame/live/3/post/enlightenment_foundation_libraries_1_15_and_friends_are_out/
  https://phab.enlightenment.org/phame/live/3/post/efl_and_elementary_1_15_1_release/



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