libstdc++: Test error handling in std::print

libstdc++: Test error handling in std::print

The standard requires an exception if std::print fails to write to a
FILE*. When writing to a std::ostream, failure to format the arguments
doesn't affect the stream state, but failure to write to the streadm
sets badbit.

libstdc++-v3/ChangeLog:

	* testsuite/27_io/basic_ostream/print/1.cc: Check error
	handling.
	* testsuite/27_io/print/1.cc: Likewise.