Log Message:
Update devel/gradle to 4.4.1.

- We started shipping JGit 4.5.3.201708160445-r in Gradle 4.4. Some of
  the non-shaded JGit resources leaked into the gradleApi() dependency
  and caused problems in some builds. We now shade all of JGit's
  resources.
- Some builds using Kotlin DSL had problems applying the build-scan
  plugin in Gradle 4.4. We've updated to kotlin-dsl 0.13.2.
- Gradle 4.4 contained changes to internal APIs that broke the popular
  Nebula dependency lock plugin. This release restores binary
  compatibility for that plugin.