Fix sign-off checker messages
Fix sign-off checker messages

The same commit cannot be both good and bad.

Change-Id: I86c64127df9d8389096d1442c16c285ff8bc78f1
Signed-off-by: David Kilroy <159cd46f289d7961b38b0171b53c05be4aaef0b6@arm.com>

ARM-software/bob-build,ARM-software/bob-build,ARM-software/bob-build,ARM-software/bob-build,ARM-software/bob-build