* c-opts.c: Default TARGET_EBCDIC to 0 if not defined.
(c_common_init): Set EBCDIC in cpp options.
* cpplex.c (maybe_read_ucs, cpp_parse_escape): Use EBCDIC option,
not conditional compilation.
* cpplib.h (struct cpp_options): New entry EBCDIC.
From-SVN: r64471
