message: Makefile: add ut target
  So that it is easier to run ut locally.
diff: @@ -26,9 +26,10 @@ static-release:
  cargo build --target x86_64-unknown-linux-musl --features=fusedev --release --target-dir target-fusedev
  cargo build --target x86_64-unknown-linux-musl --features=virtiofs --release --target-dir target-virtiofs
  -test: release
  - # Run smoke test and unit tests
  +ut:
  RUST_BACKTRACE=1 cargo test --features=virtiofs --target-dir target-virtiofs --workspace -- --nocapture --test-threads=15 --skip integration
  +test: build ut
  + # Run smoke test and unit tests
  RUST_BACKTRACE=1 cargo test --features=fusedev --target-dir target-fusedev --workspace -- --nocapture --test-threads=15
  docker-smoke:
  