wctype.h: fix libc_hidden_proto for iswupper and add it for iswspace
wctype.h: fix libc_hidden_proto for iswupper and add it for iswspace

Old typo, became visible due to other changes.

Signed-off-by: Peter S. Mazinger <1f4071d9f342c1637b13af9bc258f2ff72e96758@gmx.net>

joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc