databases/mongodb44: Update to 4.4.7

• Add a fix for compilation on aarch64 on 14-CURRENT/clang 12.

See: https://lists.freebsd.org/archives/freebsd-ports/2021-July/000431.html

Changelog: https://docs.mongodb.com/manual/release-notes/4.4-changelog/#4.4.7-changelog

PR: 257393
Approved by: lwhsu (mentor, implicit)