[Midnightbsd-cvs] src: util.c: MFC: Fix exit status of mport_xsystem so that failed

[laffer1 at midnightbsd.org]

Log Message:
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MFC: Fix exit status of mport_xsystem so that failed commands are handled properly during install/uninstall

Tags:
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RELENG_0_3

Modified Files:
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    src/lib/libmport:
        util.c (r1.15 -> r1.15.2.1)
        (http://cvsweb.midnightbsd.org/src/lib/libmport/util.c?r1=1.15&r2=1.15.2.1)