These platforms are also subject to the mis-linking problem addressed
in commit e3d77ea6.  It's not clear whether we could solve it with
a solution equivalent to GNU ld's version scripts, but -Bsymbolic
appears to fix it, so let's use that.

Like the previous commit, back-patch as far as v10.

Discussion: https://postgr.es/m/153626613985.23143.4743626885618266803@wrigleys.postgresql.org