devel/gradle: Update to 4.10.0.

- Improved incremental Java compiler.
- Periodically clean up unused /caches under GRADLE_USER_HOME and
  project root directories.
- Kotlin DSL version 1.0 RC3.
- Configuration avoidance, buildSrc refactoring propagation to the
  IDE, and lots of DSL polish.
- You can now use SNAPSHOT plugin versions with the plugins {} and
  pluginManagement {} blocks.
- Included builds can now be nested.

(fhajny)