Moved python script generate_driver_wrappers.py under scripts and
corresponding template file under script/data_files.
Signed-off-by: Archana <archana.madhavan@silabs.com>
"exit /b" without an explicit exit value doesn't copy the value of the
last command executed, causing issues on Jenkins.
Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>