New AIX libstdc++ testsuite failures

[David Edelsohn]

>>>>> Simon Martin writes:

Simon> I was waiting for the outcome of your bootstrap and testsuite run on AIX for 
Simon> confirmation that this was the appropriate fix...

Simon> If you confirm that it succeeded I can commit the patch right now.

	I posted the results and another message, but the second message
seems to have disappeared.

	Also, I noticed one testcase you missed:

src/libstdc++-v3/testsuite/27_io/basic_istream/sentry/pod/1.cc

Thanks, David