fix(build): revert cgo because of plugin need

Signed-off-by: Jiyong Huang <huangjy@emqx.io>

Makefile

@@ -39,8 +39,8 @@ build_prepare:
 
 .PHONY: build_without_edgex
 build_without_edgex: build_prepare
-	GO111MODULE=on CGO_ENABLED=0 go build -ldflags="-s -w -X main.Version=$(VERSION) -X main.LoadFileType=relative" -o kuiper cmd/kuiper/main.go
-	GO111MODULE=on CGO_ENABLED=0 go build -trimpath -ldflags="-s -w -X main.Version=$(VERSION) -X main.LoadFileType=relative" -o kuiperd cmd/kuiperd/main.go
+	GO111MODULE=on CGO_ENABLED=1 go build -ldflags="-s -w -X main.Version=$(VERSION) -X main.LoadFileType=relative" -o kuiper cmd/kuiper/main.go
+	GO111MODULE=on CGO_ENABLED=1 go build -trimpath -ldflags="-s -w -X main.Version=$(VERSION) -X main.LoadFileType=relative" -o kuiperd cmd/kuiperd/main.go
 	@if [ ! -z $$(which upx) ]; then upx ./kuiper; upx ./kuiperd; fi
 	@mv ./kuiper ./kuiperd $(BUILD_PATH)/$(PACKAGE_NAME)/bin
 	@echo "Build successfully"