(2xBR) Fix warning on PS3
Merge pull request #675 from lakkatv/lakka-integration

Lakka integration
Remove float FBO for GLES.

The extension doesn't work as a rendertarget anyways.
(Lakka) Style nits
(Menu) Make time/delta variables exposable to display driver
(Lakka) Start implementing iterate function more properly
(Lakka) Erase all copy-pasted code in menu_lakka_backend.c
(Authors) Add Lakka author to credits
(Lakka) Add fallback directory in case rgui->libretro_dir points
to nothing for core directory list
Add arrow icon for Lakka menu