[pushed] Ada : Fix bootstrap after r11-4793.

[Eric Botcazou]

> The patch omitted a change for Ada, fixed thus.
> 
> tested on x86_64-darwin,
> pushed to master as obvious/bootstrap fix.
> thanks
> Iain
> 
> gcc/ada/ChangeLog:
> 
> 	* gcc-interface/misc.c (gnat_printable_name): Change
> 	DECL_IS_BUILTIN -> DECL_IS_UNDECLARED_BUILTIN.

Thanks for fixing this!

-- 
Eric Botcazou