pgsql: Cygwin no longer needs to hack SHLIB_LINK, now that Rocco Altier

Log Message:
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Cygwin no longer needs to hack SHLIB_LINK, now that Rocco Altier
fixed the contrib library inclusions properly.

Modified Files:
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pgsql/src:
Makefile.shlib (r1.96 -> r1.97)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/Makefile.shlib.diff?r1=1.96&r2=1.97)