fold-vec-add-1.c: Add dg-options -maltivec.

fold-vec-add-1.c: Add dg-options -maltivec.

        * gcc.target/powerpc/fold-vec-add-1.c: Add dg-options -maltivec.
        * gcc.target/powerpc/fold-vec-add-2.c: Add dg-options -maltivec.
        * gcc.target/powerpc/fold-vec-add-3.c: Add dg-options -maltivec.
        * gcc.target/powerpc/fold-vec-add-4.c: Add dg-options -maltivec
        -mvsx -mpower8-vector.
        * gcc.target/powerpc/fold-vec-add-5.c: Add dg-options -maltivec -mno-vs\
x.
        * gcc.target/powerpc/fold-vec-add-6.c: Add dg-options -maltivec -mvsx.
        * gcc.target/powerpc/fold-vec-add-7.c: Add dg-options -maltivec
        -mvsx -mpower8-vector.

From-SVN: r241945