pgsql: Synchronize the shared object build rules in Makefile.port with

Log Message:
-----------
Synchronize the shared object build rules in Makefile.port with Makefile.shlib
somewhat by adding CFLAGS where the compiler is used and Makefile.shlib
already used CFLAGS.

Modified Files:
--------------
    pgsql/src:
        Makefile.shlib (r1.116 -> r1.117)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/Makefile.shlib?r1=1.116&r2=1.117)
    pgsql/src/makefiles:
        Makefile.aix (r1.27 -> r1.28)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/makefiles/Makefile.aix?r1=1.27&r2=1.28)
        Makefile.bsdi (r1.19 -> r1.20)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/makefiles/Makefile.bsdi?r1=1.19&r2=1.20)
        Makefile.freebsd (r1.23 -> r1.24)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/makefiles/Makefile.freebsd?r1=1.23&r2=1.24)
        Makefile.irix (r1.5 -> r1.6)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/makefiles/Makefile.irix?r1=1.5&r2=1.6)
        Makefile.linux (r1.22 -> r1.23)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/makefiles/Makefile.linux?r1=1.22&r2=1.23)
        Makefile.netbsd (r1.13 -> r1.14)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/makefiles/Makefile.netbsd?r1=1.13&r2=1.14)
        Makefile.openbsd (r1.13 -> r1.14)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/makefiles/Makefile.openbsd?r1=1.13&r2=1.14)
        Makefile.solaris (r1.13 -> r1.14)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/makefiles/Makefile.solaris?r1=1.13&r2=1.14)