solaris: Use versioning scripts instead of -Bsymbolic

solaris: Use versioning scripts instead of -Bsymbolic

-Bsymbolic causes a lot of "ld: warning: symbol referencing errors"
warnings. It's quite easy to add the symbol versioning script, we just need a
slightly different parameter name.

Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Discussion: https://postgr.es/m/20220823083436.whtntk3bn3qpnvmb@awork3.anarazel.de
Discussion: https://postgr.es/m/7dae5979-c6c0-cec5-7a36-76a85aa8053d@enterprisedb.com