* rclex.c: (cpp_line): Add code_page pragma support.

* rclex.c: (cpp_line): Add code_page pragma support.
* windres.c: (usage, long_options, main): Add new option --codepage or -c.
* winduni.c: (wind_default_codepage, wind_current_codepage): New.
  (unicode_from_ascii, ascii_from_unicode): Use wind_current_codepage as codepage parameter.
  (unicode_print): Print 4 characters for hexadecimal values in unicode strings.
* winduni.h:  (wind_default_codepage, wind_current_codepage): Export.
* doc/binutils.texi: Document new option.
* NEWS: Mention new feature.