support/testing: add python-click tests

Use a simple script to check the basic usage. Since this package
provides command line arguments, override run_sample_scripts to call the
script with arguments and check the expected output.

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/testing/tests/package/sample_python_click.py

@@ -0,0 +1,12 @@
+import click
+
+
+@click.command()
+@click.argument("foo")
+@click.option("--bar", is_flag=True, help="help for bar")
+def main(foo, bar):
+    click.echo("{}, {}".format(foo, bar))
+
+
+if __name__ == '__main__':
+    main()