i386-pc-solaris2.5.1: recent snapshots can't build emacs-20.2

[Jim Meyering]

| I wrote:
| | I can build emacs-20.2 using egcs-980531, but more recent snapshots
| | (starting a week or two ago) can no longer build it.  Here's the
| | failure I get using a recent snapshot (I updated last night):

I just built emacs-20.2 using the egcs-19980608 snapshot.  So now, I think
it was a change made in the week or 10 days following the June 8 snapshot.

The 0615 snapshot didn't bootstrap -- more later.