Log Message:
Update devel/gradle to 4.4.

- Visual Studio 2017 is now supported.
- The eclipse plugin now provides separate output folders
- Kotlin DSL updated to version 0.13
- Support version ranges in parent elements of a POM
- Better incremental builds and build cache support for C/C++
- Support for the combination of Play 2.6 and Scala 2.12
- Takes all plugin repositories into account and can resolve
  transitive plugin dependencies across them.