security/clamav: upgrade 0.101.3 -> 0.101.4

PR: 239684
Approved by: ports-secteam (joneum)
Relnotes: https://blog.clamav.net/2019/08/clamav-01014-security-patch-release-has.html
Security: CVE-2019-12900, CVE-2019-12625
MFH: 2019Q3