buildroot

package/expedite: bump to efl-1.15 branch

Since expedite hasn't been released since 1.7.10 release,
use efl-1.15 branch in the git tree.

Use the newly added libefl package wich provide a new version
of efl libraries.

Autoreconf the package since there is no configure script
in the git tree.

Signed-off-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>