Security update for clamav

This update for clamav fixes the following issues:

- CVE-2019-15961: Fixed a denial of service which might occur when
scanning a specially crafted email file as (bsc#1157763).

This update was imported from the SUSE:SLE-15:Update update project.

Fixed bugs
bnc#1157763
VUL-0: CVE-2019-15961: clamav: A Denial-of-Service (DoS) vulnerability may occur when scanning a specially crafted email file as a result of excessively long scan times
Selected Binaries
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