scripts: correct log output and fixed some typos

- Optimize the log for check-path failure
- Fixed some typos in the scripts

Signed-off-by: Yefeng Lin <yefeng.lin@arm.com>
Reviewed-by: Nathan Brown <nathan.brown@arm.com>
Reviewed-by: Liangxing Wang <liangxing.wang@arm.com>
Change-Id: I290c0a27f74648f424d02942c59b7ebc7480ca00