* tests/test-iconv-utf.c, tests/test-iconv.c:
Added appropriately conditional #pragmas so that the test strings
in test-iconv-utf.c are correctly interpreted in ASCII instead of
EBCDIC (i.e. 'J' == 0x4A and not 0xD1). This issue could be
addressed in a more portable way by simply rewriting all the ASCII
literal characters as octal escapes, but then you would lose the
partial readability that the strings have now. Also, iconv_open()
on z/OS does not recognize "ISO-8859-1", but "ISO8859-1" works.