altivec-8.C: Use '-maltivec' instead of '-faltivec'; include <altivec.h> explicitly.

2004-05-11  Ziemowit Laski  <zlaski@apple.com>

        * g++.dg/ext/altivec-8.C: Use '-maltivec' instead of '-faltivec';
        include <altivec.h> explicitly.
        * gcc.dg/altivec-13.c: Likewise.

From-SVN: r81719