Add human readable rotation logging

[sonninnos]

Description

Let's make the SET_ROTATION logging a bit more readable.

[zoltanvb]

I'd suggest a %4 for the rotation_v array index, not sure how strictly it is checked earlier.

[sonninnos]

Sorry but I don't understand what that means.

[zoltanvb]

RARCH_DBG("[Environ]: SET_ROTATION: %u (%udeg).\n", rotation, rotation_v[rotation%4]);

just to avoid a core calling SET_ROTATION with a dummy value and crashing in the process. I kinda expected the compiler to emit a warning, but did a build and apparently it doesn't.

[sonninnos]

Ok, cool, thanks, updated.