package/efl/libefl: add frame buffer config option

Add an config option to enable frame buffer support
in the efl libraries.

>From the README [1]:
This requires linux frame-buffer support, headers etc. This supports
basic frame-buffers like /dev/fb as well as input via /dev/input for
keyboards and mice in a basic way.

There is a bug eina_module_load().
>From [2]:
When running terminology, a message appears in eina_module_load with:
could not dlopen("/usr/lib/ecore_evas/engines/fb/v-1.15/module.so",
Error relocating /usr/lib/ecore_evas/engines/fb/v-1.15/module.so:
ecore_fb_ts_shutdown: symbol not found): RTLD_NOW
It seems like the EAPI macro has no effect...

A patch from Ross Vandegrift has been posted on enlightenment mailing
list [3], but it's not yet an upstream patch.

[1] https://git.enlightenment.org/core/efl.git/tree/README?id=v1.15.2#n521
[2] http://sourceforge.net/p/enlightenment/mailman/message/34493376
[3] http://sourceforge.net/p/enlightenment/mailman/message/34492801



Signed-off-by: Romain Naour <romain.naour@openwide.fr>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>