Print build env infomation (#13300)

Signed-off-by: Ndragondriver <jiquan.long@zilliz.com>

Makefile

@@ -89,7 +89,13 @@ BUILD_TIME = $(shell date --utc)
 GIT_COMMIT = $(shell git rev-parse --short HEAD)
 GO_VERSION = $(shell go version)
 
-milvus: build-cpp
+print-build-info:
+	@echo "Build Tag: $(BUILD_TAGS)"
+	@echo "Build Time: $(BUILD_TIME)"
+	@echo "Git Commit: $(GIT_COMMIT)"
+	@echo "Go Version: $(GO_VERSION)"
+
+milvus: build-cpp print-build-info
 	@echo "Building Milvus ..."
 	@mkdir -p $(INSTALL_PATH) && go env -w CGO_ENABLED="1" && GO111MODULE=on $(GO) build \
 		-ldflags="-X 'main.BuildTags=$(BUILD_TAGS)' -X 'main.BuildTime=$(BUILD_TIME)' -X 'main.GitCommit=$(GIT_COMMIT)' -X 'main.GoVersion=$(GO_VERSION)'" \
@@ -163,7 +169,7 @@ clean:
 	@rm -rf lib/
 	@rm -rf $(GOPATH)/bin/milvus
 
-milvus-tools: 
+milvus-tools: print-build-info
 	@echo "Building tools ..."
 	@mkdir -p $(INSTALL_PATH)/tools && go env -w CGO_ENABLED="1" && GO111MODULE=on $(GO) build \
 		-ldflags="-X 'main.BuildTags=$(BUILD_TAGS)' -X 'main.BuildTime=$(BUILD_TIME)' -X 'main.GitCommit=$(GIT_COMMIT)' -X 'main.GoVersion=$(GO_VERSION)'" \