package/efl: add missing licenses

ecore_con added with efl 1.17 is under MIT license (COPYING.NGINX-MIT)
ector added with efl 1.15 is under FTL license (COPYING.FTL)

While at it, add license file hash.

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>