pginstaller - pginst: Add check for compilers that break on UTF-8

Log Message:
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Add check for compilers that break on UTF-8 encoded files.

Modified Files:
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pginst/ca:
Makefile (r1.12 -> r1.13)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/Makefile.diff?r1=1.12&r2=1.13)

Added Files:
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pginst/ca:
mbtest.c (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/mbtest.c?rev=1.1&content-type=text/x-cvsweb-markup)