sjlj-exceptions ICE. simplified test case

[Robert Lipe]

> > ../../egcs/gcc/cp/tinfo.cc: In method `bad_cast::bad_cast ()':
> > ../../egcs/gcc/cp/tinfo.cc:1181: Internal compiler error.
> 
> This fixes that.  It's the cudgel, but when considering delayed function

Indeed it does.  My sjlj target will now bootstrap with BOOT_CFLAGS=-O2
once again.  The dwarf code still hoses, but let's take them one at a
time.  I'll see if I can reduce the dwarf failure similarly if there is
benefit in doing so.

Thanx for the fixes, Richard.

RJL