dailyupdate.py: fix files update for linux-next.git

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
base.py: fix show patch and report by version

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
dailyreport.py: fix delta scan for linux-next.git

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
settings: add config USING_COMMIT_SINGER

Add config USING_COMMIT_SINGER to enable/disable show
commit singer in patch sendto mail list.

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>