tools/verifygitlog.py: Show required format regexp in error message.
tools/verifygitlog.py: Show required format regexp in error message.

Change-Id: Ibb5273f5a8318499196326e6120b2cdd9e8c23ff
Signed-off-by: iTitou <81bb7a88fd1af9ab7737b57a05fcea21cbba66b8@gmail.com>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython