Fix type of shuffle obtained from reordering with binary operation

In transformation:
    BinOp(shuffle(v1,undef), shuffle(v2,undef)) -> shuffle(BinOp(v1, v2),undef)
type of the undef argument must be same as type of BinOp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208531 91177308-0d34-0410-b5e6-96231b3b80d8