Rename _NL_CTYPE_OUTDIGITSx_MB/WC to _NL_CTYPE_OUTDIGITx_MB/WC
The extended _NL_foo names were originally designed after their GLibc
counterparts. However, the OUTDIGIT macros were accidentally defined as
OUTDIGITS, plural. Fix them.
Fixes: d47d5b850bed ("Extend locale support to maintain wide char values of native strings")
Conflicts: Context formatting changes in winsup/utils/locale.cc not
backported to 3.4 branch Signed-off-by: Corinna Vinschen <corinna@vinschen.de>