[patch, rfa] charset testsuite patches, take 2

[David Edelsohn]

>>>>> Eric Christopher writes:

Eric> OK. See, that's a problem with *_target_compile. I'm not actually doing
Eric> anything but calling that. If this doesn't work then how did the
Eric> testcase work at all in the first place? (Since we just call
Eric> $tool_target_compile on each file...)

	The previous testing of iconv functionality was within
libstdc++-v3 testsuite.  libstdcc++.so links against libiconv.a on
platforms where that library is required and implicitly provides that
functionality.  iconv_open() is not explicitly in the test itself.

	Your new tests explicitly reference iconv_open() without linking
against LIBICONV.

David