v1.29.0

This is a major Erlang and Buildroot update.

Please see the nerves_system_br v1.29.0 release notes
for upgrade instructions if you've forked this system.

• Changes

  • Applied and enabled the Real-Time Linux patch set, PREEMPT_RT. Please see
    write-ups on the web for benefits and how to use. The impact of this patch
    shouldn't be noticeable to most Nerves users.
  • Switch CPU frequency governor from conservative to the more modern
    schedutil. See LWN article for details.

• Updated dependencies

  • nerves_system_br v1.29.1
  • Buildroot 2024.08.2
  • Linux 6.6.51 (Raspberry Pi stable_20241008 release)