[X86][PCLMUL] Add scheduling latency/throughput test for PCLMULQDQ instruction

Added it to the SSE42 tests as targets seem to always have both

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@311166 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed