[SPARC] Fix build failure

[David Miller]

From: Eric Botcazou <ebotcazou@adacore.com>
Date: Tue, 4 Oct 2011 09:37:01 +0200

> Tested on SPARC/Solaris, applied on the mainline.
> 
> 
> 2011-10-04  Eric Botcazou  <ebotcazou@adacore.com>
> 
> 	* config/sparc/sparc.c (sparc_fold_builtin): Use a sequence of tests.

Thanks for fixing this Eric.