[foreign-jextract] Gradle plugin

[Filip Krakowski]

Hi,

I wrote a simple plugin for integrating jextract with the Gradle build 
system and thought this would be a good place to share it with others. 
The plugin's source code and a small example are both hosted on GitHub.

  * Plugin - https://github.com/krakowski/gradle-jextract
  * Example - https://github.com/krakowski/jextract-demo


Best regards,
Filip