message: nydusify/Makefile: add ut target into Makefile
  Thus to perform unit tests distributed at diffent packages.
diff: @@ -13,5 +13,8 @@ build:
  static-release:
  @CGO_ENABLED=0 ${PROXY} GOOS=linux go build -ldflags '-X main.versionGitCommit=${GIT_COMMIT} -X main.versionBuildTime=${BUILD_TIME}' -o ./cmd ./cmd/nydusify.go
  -build-smoke:
  - @CGO_ENABLED=0 ${PROXY} GOOS=linux go test -v -c -o ./nydusify-smoke ./tests
  +ut:
  + @go test -count=1 -v -timeout 20m -race ./pkg/...
  +
  +build-smoke: ut
  + @CGO_ENABLED=0 ${PROXY} GOOS=linux go test -race -v -c -o ./nydusify-smoke ./tests
  