v4l-utils: added some keys to rc6_mce map for xbox360 slim black remote, fixes #2331
v4l-utils: fix patch after https://github.com/OpenELEC/OpenELEC.tv/commit/78acd74f51af903a04534be6d6bf65c6f7f2c30d

Signed-off-by: Stephan Raue <stephan@openelec.tv>