v1.4.0

This pulls in a pending patch in Buildroot to update the version of
OpenSSL from 1.0.2 to 1.1.0h. This fixes what appears to be issues with
Erlang using OpenSSL engines. It also enables Erlang crypto algorithms
such as ed25519 that have been added in recent Erlang releases.

• Updated dependencies

  • nerves_system_br v1.6.5
  • Erlang 21.2.2
  • boardid 1.5.2
  • erlinit 1.4.9
  • OpenSSL 1.1.1a
  • Linux 4.14.89 with patches from the Raspberry Pi Foundation
  • libp11 0.4.9

• Enhancements

  • Moved boardid config from inside erlinit.config to /etc/boardid.config
  • Compile gpiomem into the Linux kernel
  • Enable pstore, an in-memory buffer that can capture logs, kernel
    oops and other information when unexpected reboots. The buffer can be
    recovered on the next boot where it can be inspected.