Change the xfail in gcc.dg/uninit-pr89230-1.c

With the recent PHI-OPT patch for line numbers, I had missed this
testcase was now failing. The uninitialized warning was there
before my recent patch, just was on the wrong line. The testcase
had added an xfail in r12-4698-gf6d012338 (though a bug report was
not filed to record it).
This patch changes the dg-bogus messages around to catch both locations
and xfail both of them.

At least there is now a patch for the correct line numbers for the
phi-opt.

Committed after testing the testcase.

gcc/testsuite/ChangeLog:

	* gcc.dg/uninit-pr89230-1.c: Change the dg-bogus messages
	around and xfail both of them.