"devel/protobuf" build fails on netbsd-9/i386

["John D. Baker" <jdbaker%consolidated.net@localhost>]

Building "devel/protobuf" on netbsd-9/i386 (up-to-date 9.2_STABLE) fails
with:

[...]
gmake[2]: Entering directory '/tmp/pkgsrc/devel/protobuf/work/protobuf-3.20.1/src'
  CXX      google/protobuf/arenastring.lo
google/protobuf/arenastring.cc:67:1: error: static assertion failed
 static_assert((kStringAlign > kNewAlign ? kStringAlign : kNewAlign) >= 8, "");
 ^~~~~~~~~~~~~
gmake[2]: *** [Makefile:4521: google/protobuf/arenastring.lo] Error 1
gmake[2]: Leaving directory '/tmp/pkgsrc/devel/protobuf/work/protobuf-3.20.1/src'
gmake[1]: *** [Makefile:1930: all-recursive] Error 1
gmake[1]: Leaving directory '/tmp/pkgsrc/devel/protobuf/work/protobuf-3.20.1'
gmake: *** [Makefile:1837: all] Error 2
*** Error code 2

Stop.
make[1]: stopped in /x/pkgsrc/devel/protobuf
*** Error code 1

Stop.
make: stopped in /x/pkgsrc/devel/protobuf


This was with pkgsrc-HEAD during the freeze.  Now that pkgsrc-2022Q2 has
been tagged, I'll update and try again, but I don't expect any change.

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