[testsuite] (checked in) fix g++.dg/ext/altivec-3.C

[Mike Stump]

On Jun 20, 2006, at 4:34 PM, Janis Johnson wrote:
> A recent change to the C++ compiler causes this test to fail when run
> on a powerpc64-linux system without hardware VMX support.

> This patch, suggested by Andrew Pinski, allows the test to continue  
> to work.
> Tested on powerpc64-linux with -m32/-m64, checked in on mainline.

I am suspicious of the validity of papering over a regression this  
way.  :-(