[BUG] Checkpatch gives long-line warnings for Reported-*-by variants

[Siddh Raman Pant]

Dear Checkpatch Maintainers,

Checkpatch gives COMMIT_LOG_LONG_LINE warning for the signature line
with Reported-and-tested-by and other variants. The $signature_tags
variable does not account for them.

This warning will be encountered without fail when using long names
and email addresses, for eg. the syzkaller's email addresses which
contains a 20 char identifier.

Unfortunately, I don't know perl enough to send a patch. Hence, I
request you to please fix this false positive warning.

Thanks,
Siddh