Move class-less functions in utils.cpp into a new Utils class and make the old
functions static. This prevents clashes with system C functions. Rename some
functions to avoid macro problems (check() is a macro on OS X). Split out the
RockboxInfo class into a separate file.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25441 a1c6a512-1295-4272-9138-f99709370657
