Add a triple to fix the test on OS X.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203706 91177308-0d34-0410-b5e6-96231b3b80d8
Resubmit "[SLPV] Recognize vectorizable intrinsics during SLP vectorization ..."

This reverts commit 86cb795388643710dab34941ddcb5a9470ac39d8.
The problems previously found have been resolved through other CLs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203707 91177308-0d34-0410-b5e6-96231b3b80d8