community/mupdf: rebuild against the provided FreeGLUT
Patchset from Carlo Dé sbb@tuxfamily.org via aports #3683:
Otherwise mupdf-gl issues this warning:
warning: This version of MuPDF has been built WITHOUT clipboard or unicode input support!
warning: Please file a complaint with your friendly local distribution manager.
Upstream introduced this to alert their own special FreeGLUT must be used:
https://git.ghostscript.com/?p=mupdf.git;a=commit;h=06c999fec01863a90824ba2f9f3ce98ea1a967d3