ghostscript: Addition of patch to fix freetype problem

ghostscript: Addition of patch to fix freetype problem

-Addition of patch to ghoscript as freetype version 2.10.3 and later
	have withdrawn a macro that ghostscript used. Confirmed that without
	the patch ghostscript failed to build due to the lack of the
	FT_CALLBACK_DEF() macro. The fix is to explicitly declare the
	callbacks file static.
- Update lfs to apply patch
- Add patch to src/patches

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>