!4146 support leaky relu parser

Merge pull request !4146 from sunsuodong/leaky_relu

mindspore/lite/schema/ops.fbs

@@ -142,6 +142,7 @@ table SoftMax {
 
 table Activation {
     type: ActivationType = 0;
+    alpha: float = 0.2;
 }
 table ActivationGrad {
     type: ActivationGradType = 0;

mindspore/lite/src/populate_parameter.cc

@@ -487,6 +487,7 @@ OpParameter *PopulateActivationParameter(const lite::Primitive *primitive) {
   }
   auto activation = primitive->Value()->value_as_Activation();
   act_param->type_ = static_cast<int>(activation->type());
+  act_param->alpha_ = activation->alpha();
   return reinterpret_cast<OpParameter *>(act_param);
 }
 

mindspore/lite/src/runtime/kernel/arm/nnacl/fp32/activation.h

@@ -24,7 +24,7 @@
 struct ActivationParameter {
   OpParameter op_parameter_;
   int type_;
-  float alpha_{0.01};
+  float alpha_{0.2};
 };
 
 inline int Relu(const float *src, int length, float *dst) {

mindspore/lite/tools/converter/parser/caffe/caffe_relu_parser.cc

@@ -25,22 +25,18 @@ STATUS CaffeReluParser::Parse(const caffe::LayerParameter &proto,
                               std::vector<schema::TensorT *> *weightVec) {
   std::unique_ptr<schema::ActivationT> attr(new schema::ActivationT());
   attr->type = schema::ActivationType_RELU;
-  op->primitive = std::make_unique<schema::PrimitiveT>();
-  op->primitive->value.value = attr.release();
-  op->primitive->value.type = schema::PrimitiveType_Activation;
   // relu: negative_slope = 0, no parameter;
   // leakyrelu: negative_slope != 0;
   if (proto.has_relu_param() && proto.relu_param().has_negative_slope()) {
     float negative_slope = proto.relu_param().negative_slope();
-
     if (0 != negative_slope) {
-      std::unique_ptr<schema::LeakyReLUT> attrLeakyReLu(new schema::LeakyReLUT());
-      attrLeakyReLu->negativeSlope = negative_slope;
-      op->primitive = std::make_unique<schema::PrimitiveT>();
-      op->primitive->value.type = schema::PrimitiveType_LeakyReLU;
-      op->primitive->value.value = attrLeakyReLu.release();
+      attr->type = schema::ActivationType_LEAKY_RELU;
+      attr->alpha = negative_slope;
     }
   }
+  op->primitive = std::make_unique<schema::PrimitiveT>();
+  op->primitive->value.value = attr.release();
+  op->primitive->value.type = schema::PrimitiveType_Activation;
   return RET_OK;
 }