unable to flash mrchromebox custom fw on x64cros with pmOS
From what I understand, mrchromebox's process for flashing custom fw on these devices requires using a script that downloads prebuilt flashrom and other tools. These tools don't run on musl (https://github.com/MrChromebox/scripts/issues/412), but we're also not able to use fastboot from Alpine because the prebuilt one is from a fork that has fixes for some chromebooks. So, we should package this flashrom fork in pmaports and make it available so that folks running pmOS on x64cros can flash custom fw from within the OS. This may require also working with mrchromebox upstream to modify the script so that it can use a local copy of these tools and not always fetch/run the versions that don't work on musl.