Thread: pgsql: Adjust postgres.xml rule so that make will notice a failure exit

Log Message:
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Adjust postgres.xml rule so that make will notice a failure exit from osx.
The previous coding had it in a pipe, which on most shells won't report
the error.  Per experimentation with a bug report from Vladimir Kokovic.
This doesn't actually fix his problem, but it does explain why make
didn't report that there was a problem.

Modified Files:
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    pgsql/doc/src/sgml:
        Makefile (r1.140 -> r1.141)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/Makefile?r1=1.140&r2=1.141)