Added Canon EOS 50D.
Added Canon EOS 50D.

darktable-org/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,anarsoul/rawspeed,anarsoul/rawspeed,klauspost/rawspeed,darktable-org/rawspeed,klauspost/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,mgehre/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,anarsoul/rawspeed,LebedevRI/rawspeed,mgehre/rawspeed