Remove ghostscript option, and always depend on ghostscript: even when
disabled, it still probes for, finds, and depends on the gs
binary. (In fact, even if it can't find the gs binary it still depends
on it at runtime.) The only thing the option was controlling was
linking against the ghostscript library, and disabling just that seems
pointless.

PKGREVISION -> 4

(dholland)