pgsql: Be more wary about which LIBS elements to pull into sslinfo link.

Log Message:
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Be more wary about which LIBS elements to pull into sslinfo link.
Per buildfarm results.

Modified Files:
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pgsql/contrib/sslinfo:
Makefile (r1.3 -> r1.4)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/sslinfo/Makefile.diff?r1=1.3&r2=1.4)