Automatic build and test script

[johnr14]

Just a suggestion :

Having a test script that would build the docker, fetch all project's git is they don't exist and try to build them, check for the .apk and provide a summary of what was built and what wasn't with log output to individual files.

If a repository is already present, keep it as is. That way, it would be possible to test different branches or forks.

Could be useful to test updating the docker's various sdk and java version. As well as testing OpenXR future ports or pull request.

Sounds a good idea ?