Test DWARF2_UNWIND_INFO value for sjlj exceptions

[Rainer Orth]

Richard Henderson writes:

> > as0: Error: _divdi3.s, line 880:undefined symbol in expression
> >       .word $LECIE1-$LSCIE1  
> 
> Does
> 
> 	.word $Lasdf
> $Lasdf = $LECIE1-$LSCIE1
> 
> or somesuch work?

unfortunately not: I've found no variation of symbolic equates or another
solution to make this work ;-(

	Rainer