Added mender integration for verdin board

[siredmar]

Mender Layer

• [x] Integration of mender layers meta-mender-core, meta-mender-demo, meta-mender-commercial, meta-mender-community (meta-mender-toradex-nxp)
• [x] meta-ci.os Layer, branch: dunfell

Mender Delta Update

• [x] currently buggy (https://github.com/openembedded/openembedded-core/blob/master/meta/classes/rootfs-postcommands.bbclass#L95-L98) -> Fixed in meta-ci.os (ci4rail/meta-ci.os#3)
• [x] https://tracker.mender.io/browse/MEN-4246 -> Fix pending by mender, but independent for this PR.
• [x] automatically download of mender-delta-update from mender server

Versioning

• [x] using meta-ci.os:dunfell for versioning (see ci4rail/meta-ci.os#3)
• [x] using elbb/bb-gitversion:0.7.0
• [x] image name: containing version:

  $ ls *Verdin*Reference*.{mender,tar} 
  Verdin-iMX8MM_Reference-Minimal-Image_CI.OS.LMP-0.1.0-11.Branch.feature-mender.Sha.0673dd8c269de7da7e441d6d482f3df7189db2ec-dev.mender
  Verdin-iMX8MM_Reference-Minimal-Image_CI.OS.LMP-0.1.0-11.Branch.feature-mender.Sha.0673dd8c269de7da7e441d6d482f3df7189db2ec-dev.mender_tezi.tar

• [x] on device: version can be read out:

  $ cat /etc/issue
  TDX Wayland with XWayland 5.0.0-devel-20201216110027+build.0 (dunfell) \n \l
  Verdin-iMX8MM_Reference-Minimal-Image_CI.OS.LMP-0.1.0-11.Branch.feature-mender.Sha.0673dd8c269de7da7e441d6d482f3df7189db2ec-dev

• [x] mender artifact: has version in name:

  $ mender-artifact read Verdin-iMX8MM_Reference-Minimal-Image_CI.OS.LMP-0.1.0-11.Branch.feature-mender.Sha.0673dd8c269de7da7e441d6d482f3df7189db2ec-dev.mender
  Mender artifact:
  Name: 0.1.0-11.Branch.feature-mender.Sha.0673dd8c269de7da7e441d6d482f3df7189db2ec-dev
  ...

[siredmar]

@KlausPopp this is can be reviewed. Mender still has to fix mender-delta-update. However, the fix by mender is independent of this PR.

[siredmar]

1. Build warnings: The devicetree warning will be removed during yocto tailoring. The mender-client warnings, will be removed when removing meta-mender-demo during tailoring.

2. Build failure: fixed in 676b534 with automatically downloading mender-binary-delta from mender server.

[siredmar]

Image was built succesfully, but I get a strange message at the end of the build: Exception ignored when trying to write to the signal wakeup fd: BlockingIOError: [Errno 11] Resource temporarily unavailable

Is it a server issue?

I did't see these kind errors before. I tested building locally on devserver and with ci/cd. Googling this error seems a generic python error, when too may file descriptors are open. If this gets a real problem for us, we should investigate more. For now, it's not a bug introduced by this PR.

[yoda-ci4rail]

:tada: This PR is included in version 1.0.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: