message: Fix CI script (again).
diff: @@ -38,7 +38,7 @@ else
  cargo bench $BUILD_ARGS -- --test
  cd ..
  - if [ "$TRAVIS_RUST_VERSION" == "nightly" ]; then
  + if [ "$TRAVIS_RUST_VERSION" = "nightly" ]; then
  cd macro
  export CARGO_TARGET_DIR="../target"
  cargo bench $BUILD_ARGS -- --test
  