Rename DECL_IS_BUILTIN to DECL_IS_UNDECLARED_BUILTIN

[Iain Sandoe]

Andreas Schwab <schwab@linux-m68k.org> wrote:

> ../../gcc/ada/gcc-interface/misc.c: In function 'const char*  
> gnat_printable_name(tree, int)':
> ../../gcc/ada/gcc-interface/misc.c:562:47: error: 'DECL_IS_BUILTIN' was  
> not declared in this scope
>   if (verbosity == 2 && !DECL_IS_BUILTIN (decl))

should be fixed by
https://gcc.gnu.org/pipermail/gcc-cvs/2020-November/336719.html

thanks
Iain