Add scripts to identify and fix issues with license text in various files.
Update files with license text issues using these scripts.
Use 'make license-check' to identify license issues and 'make license-fix'
to fix the issues.

Signed-off-by: Lijian Zhang <Lijian.Zhang@arm.com>
Reviewed-by: Tianyu Li <Tianyu.Li@arm.com>
Reviewed-by: Nathan Brown <Nathan.Brown@arm.com>

Change-Id: I33b88f00830aba4471c8065256815a1421cab76f