pg-migrator - pg_migrator: Add code for port to Win32.

Log Message:
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Add code for port to Win32.

Hiroshi Saito

Modified Files:
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    pg_migrator/src:
        exec.c (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/exec.c.diff?r1=1.2&r2=1.3)
        file.c (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/file.c.diff?r1=1.5&r2=1.6)
        option.c (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/option.c.diff?r1=1.4&r2=1.5)
        pg_migrator.h (r1.10 -> r1.11)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/pg_migrator.h.diff?r1=1.10&r2=1.11)
        util.c (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/util.c.diff?r1=1.4&r2=1.5)