Adapt to Bison 3.8 internal yyn -> yyrule rename

Adapt to Bison 3.8 internal yyn -> yyrule rename

see
<https://git.savannah.gnu.org/cgit/bison.git/commit/?id=f30067ed51f23802fc91761ede1506dfa72b2865>
"glr2.cc: log the execution of deferred actions" including "Rename argument yyn
as yyrule for clarity."

YYBISON was defined as 1 rather than as a representation of the Bison version
prior to
<https://git.savannah.gnu.org/cgit/bison.git/commit/?id=21c147b6e5372563b7c4741deadaddb9354f4b09>
"yacc.c: provide the Bison version as an integral macro", which shouldn't be a
problem here.  And YYBISON is apparently completely undefined with
/usr/bin/bison on macOS.

(The preceding comment always mentioned "yyi" and "yyrmap" in apparent mismatch
with the actually used "yyn" and "yyr1" ever since
c25ec0608a167bcf1d891043f02273761c351701 "initial import", so just leave it
untouched.)

Change-Id: I4f901407aa21ed4abec84e661d813ee7599f02f0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/122082
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Gbp-Pq: Name bison-3.8.diff