groff: update 1.22.4 -> 1.23.0

groff: update 1.22.4 -> 1.23.0

Drop backports.

Rebase
0001-Make-manpages-mulitlib-identical.patch
groff-not-search-fonts-on-build-host.patch

--without-doc has been removed upstream; replace
that with a dependency on groff-native and
substitution of groff executable from that.

Drop serial make; this was introduced in 2010 without
explanation and likely been solved long time ago.

Set urw fonts directory to something bogus to avoid host contamination.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>