buildroot

rsync: security bump to version 3.1.3

Fixes CVE-2018-5764: remote attackers can bypass an
argument-sanitization protection mechanism

Drop upstream patches.

Add license file hash.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>