[syslinux] extlinux: missing text on serial output

[H. Peter Anvin]

H. Peter Anvin wrote:
> 
> There isn't all that much I can do about it, other than use an indirect 
> call here (see patch.)
> 
> I'm slightly hesitant to add this patch to the main code, though, to 
> support a very old and obviously broken linker.
> 

n/m, found an even uglier workaround but which at least doesn't bugger 
up the object code.  Checked into git.

	-hpa