Upgrade Linux to 4.19.37-4+
Originally created by @intrigeri on #16823 (Redmine)
- https://tracker.debian.org/news/1041387/accepted-linux-41937-4-source-into-unstable/
- https://www.debian.org/security/2019/dsa-4465
Feature Branch: bugfix/16823-linux-4.19.37-4+force-all-tests