bash script which tests that amberc command generates the js file

Hello, 

This script only tests the js file generation, we'll complete with further tests later.

Thanks.

Quentin, Célia, Jonathan, Romain
I think it would be much cleaner if the files were stored in a temporary directory with a unique name.
This would reduce possible issues with existing files having the same name.
Additionally, it is then safe to remove the complete directory and not only select files.