[patch] Fix gcc.dg/compare1.c failure on ARM. (Take 3)

[Kazu Hirata]

Hi Paul,

> This isn't quire what I meant. I mean duplicate the tests (as you have done). 
> Compile one test with -fno-short-enums, and the other with -fshort-enums. all 
> targets should then give identical results. Modify the dg-warning markers so 
> that both tests pass.
> 
> The target specific xfail/skip is what I was trying to avoid :-)

Gah!  I'll fix this.  Yes, your idea is much much cleaner than 
explicitly mentioning target names.

Kazu Hirata