cpplib.c (struct directive): Const-ify name pointer and function pointer prototype.

1999-08-31 12:44 -0700  Zack Weinberg  <zack@bitmover.com>

	* cpplib.c (struct directive): Const-ify name pointer and
	function pointer prototype.
	(validate_else, do_define, do_line, do_include, do_undef,
	do_error, do_pragma, do_ident, do_if, do_xifdef, do_else,
	do_elif, do_endif, do_sccs, do_assert, do_unassert,
	do_warning): Const-ify second arg.
	(directive_table): Mark const.  Reorder entries by frequency
	of usage, record statistics.

From-SVN: r29009