package/clamav: security bump to version 0.103.5

ClamAV 0.103.5 is a critical patch release with the following fix:

 - CVE-2022-20698: Fix for invalid pointer read that may cause a crash.
   Affects 0.104.1, 0.103.4 and prior when ClamAV is compiled with
   libjson-c and the CL_SCAN_GENERAL_COLLECT_METADATA scan option (the
   clamscan --gen-json option) is enabled.

https://github.com/Cisco-Talos/clamav/blob/clamav-0.103.5/NEWS.md



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>