fix the way to install protoc-gen-go-grpc

Signed-off-by: Wei Liu <[email protected]>

Makefile

@@ -226,13 +226,15 @@ build-3rdparty:
 generated-proto-without-cpp: download-milvus-proto
 	@echo "Generate proto ..."
 	@mkdir -p ${GOPATH}/bin
-	@which protoc-gen-go 1>/dev/null || (echo "Installing protoc-gen-go" && go install google.golang.org/protobuf/cmd/[email protected]) || (echo "Installing protoc-gen-go-grpc" && go install google.golang.org/grpc/cmd/[email protected])
+	@which protoc-gen-go 1>/dev/null || (echo "Installing protoc-gen-go" && go install google.golang.org/protobuf/cmd/[email protected])
+	@which protoc-gen-go-grpc 1>/dev/null || (echo "Installing protoc-gen-go-grpc" && go install google.golang.org/grpc/cmd/[email protected])
 	@(env bash $(PWD)/scripts/generate_proto.sh)
 
 generated-proto: download-milvus-proto build-3rdparty
 	@echo "Generate proto ..."
 	@mkdir -p ${GOPATH}/bin
-	@which protoc-gen-go 1>/dev/null || (echo "Installing protoc-gen-go" && go install google.golang.org/protobuf/cmd/[email protected]) || (echo "Installing protoc-gen-go-grpc" && go install google.golang.org/grpc/cmd/[email protected])
+	@which protoc-gen-go 1>/dev/null || (echo "Installing protoc-gen-go" && go install google.golang.org/protobuf/cmd/[email protected])
+	@which protoc-gen-go-grpc 1>/dev/null || (echo "Installing protoc-gen-go-grpc" && go install google.golang.org/grpc/cmd/[email protected])
 	@(env bash $(PWD)/scripts/generate_proto.sh)
 
 build-cpp: generated-proto