Update longlong.h from GCC

[Richard Henderson]

Roland McGrath wrote:
> That GCC asm syntax with the braces is new to me.  Can you clarify the
> earliest GCC version that the new longlong.h is compatible with?
> (glibc supposedly can still be compiled with 3.4.)

The braces are very very old syntax, actually.  I think it was
added to the i386 port at version 3.0, with the Intel assembly
syntax.

That said, I know some of the __builtins used there are later
than 3.4...


r~