This resolves a hang in the menu of the WaveRace game.
* gnu/packages/patches/dolphin-emu-data.patch: New file.
* gnu/packages/patches/libretro-dolphin-emu-data.patch: Likewise.
* gnu/local.mk (dist_patch_DATA): Register them.
* gnu/packages/emulators.scm (dolphin-emu) [source]: Apply dolphin-emu patch.
(libretro-dolphin-emu) [source]: Apply libretro-dolphin-emu patch.
Reviewed-by: Sou Bunnbu (宋文武) <iyzsong@member.fsf.org>
Change-Id: Ie22a7bba527724179f5296a44f1874d2efdbd94c
