message: Support SelectV2 op in Grappler.
diff: @@ -457,7 +457,9 @@ bool IsRsqrt(const NodeDef& node) { return node.op() == "Rsqrt"; }
  bool IsRsqrtGrad(const NodeDef& node) { return node.op() == "RsqrtGrad"; }
  -bool IsSelect(const NodeDef& node) { return node.op() == "Select"; }
  +bool IsSelect(const NodeDef& node) {
  + return node.op() == "Select" || node.op() == "SelectV2";
  +}
  bool IsSeluGrad(const NodeDef& node) { return node.op() == "SeluGrad"; }
  