c-decl.c: Search-and-replace change 'binding level' to 'scope' in commentary.

c-decl.c: Search-and-replace change 'binding level' to 'scope' in commentary.

	* c-decl.c: Search-and-replace change 'binding level' to
	'scope' in commentary.
	(struct binding_level): Now struct c_scope.
	(current_binding_level): Now current_scope.
	(free_binding_level): Now scope_freelist.
	(current_function_level): Now current_function_scope.
	(global_binding_level): Now global_scope.
	(make_binding_level): Now make_scope.
	(pop_binding_level): Now pop_scope.

From-SVN: r69747