tccpp: cleanup options -dD -dM, remove -C

The lexer is for reading files, not for writing.

Also :
- macro_is_equal(): avoid crash if redefining __FILE__

tccelf.c

@@ -3282,7 +3282,7 @@ static int ld_next(TCCState *s1, char *name, int name_size)
     case '/':
         minp();
         if (ch == '*') {
-            file->buf_ptr = parse_comment(file->buf_ptr,0);
+            file->buf_ptr = parse_comment(file->buf_ptr);
             ch = file->buf_ptr[0];
             goto redo;
         } else {