message: update CHECK_NOTNULL and CHECK_EQ to DCHECK
diff: @@ -1097,10 +1097,10 @@ class MklLayoutRewritePass : public GraphOptimizationPass {
  // These two algorithm are not consistent when alpha > 1
  // so only LeakyRelu is written to MKL OP when alpha < 1
  static bool LeakyReluRewrite(const Node* n) {
  - CHECK_NOTNULL(n);
  + DCHECK(n);
  float alpha;
  - CHECK_EQ(GetNodeAttr(n->def(), "alpha", &alpha).ok(), true);
  + DCHECK(GetNodeAttr(n->def(), "alpha", &alpha).ok());
  // If the alpha of LeakyRelu is less than 1, rewrite the node.
  // Otherwise eigen node is used instead.
  