Distinguish between release and current build when installing fonts.

As with the voice file installation changed in r26637 the same issue exists for
fonts.  While the fonts package rarely changes and therefore this shouldn't
have had a negative impact in the past use the correct font package anyway.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26667 a1c6a512-1295-4272-9138-f99709370657
4 files changed