Upgrade Linux to 4.19.37-4+

• 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

Related issues

• Blocks #16209

Original created by @intrigeri on 16823 (Redmine)