MFH: r514207

databases/mongodb34: upgrade 3.4.21 -> 3.4.22

PR: 239717
Submitted by: Ronald Klop <ronald-lists@klop.ws> (maintainer)
Relnotes: https://docs.mongodb.com/manual/release-notes/3.4/#aug-6-2019
Security: CVE-2019-2386, CVE-2019-2389, CVE-2019-2390
Approved by: ports-secteam (miwi)