* builtins.c (expand_builtin_constant_p, expand_builtin_strlen,
expand_builtin_frame_address): Update prototypes.
(expand_builtin_constant_p, expand_builtin_strlen,
expand_builtin_strcpy, expand_builtin_memset,
expand_builtin_bzero, expand_builtin_args_info,
expand_builtin_frame_address): Pass in just the argument(s)
needed, not the entire expression `exp'.
(expand_builtin): Update all calls to these functions.