Log Message:
print/cups-filters: Avoid portablity check fail

This package has a script which is written for bash and has a bashism.
While that's a bug, the package has REPLACE_BASH for it and further
doesn't include the file in the PLIST.  So there's no benefit to
pkgsrc fixing this, other than the quest to rid the world of bashisms.
Simply skip checks on this file.