package/x11r7/xfont_font-*: make outputs reproducible

package/x11r7/xfont_font-*: make outputs reproducible

Prior to gzip 1.10, the compression pipeline used with PCF fonts was
not reproducible due to the implicit -N/--name injecting a timestamp:

  $ cat /path/to/file | gzip > /path/to/file.gz

This updates Portable Compiled Format font packages to have a host-gzip
dependency, so gzip version 1.10 or newer will reliably be used.

This change does not affect encodings, which use a seemingly
synonymous compression pipeline, but that happens to be reproducible
with gzip versions at least as old as version 1.3.13:

  $ gzip < /path/to/file > /path/to/file.gz

Reported-by: Jordan Speicher <jspeicher@xes-inc.com>
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>