[rbp] Remove unnecessary gl ifdef

I'm not sure why this was originally added.
I couldn't think of a reason why the Pi would want things done differently here,
so I tried without the ifdef. I can't see any difference in behaviour,
so I think we're better off removing it.
clean up /xbmc refs and and sort
changed utils/Makefile to use Makefile.in
fixed, ref tools/depends/README
[musicdb] fix: exporttoXML hang
invalid use of genre ID when checking for a scraper set on an album
fixed compiler warnings
Merge pull request #2686 from popcornmix/remove_gl_ifdef

[rbp] Remove unnecessary gl ifdef