* firmware: fix building on Linux
processor is non-portable, though some Linux distributions patch around this (generally by report machine instead)
* firmware: tidy use_arm_gcc.mk
* fix failure logic
* add compiler submodule
* use compiler from git if not found on path
* add todo
* select darwin vs. linux properly
* update submodule for darwin compiler
* match formatting
* hide stray ramdisk images
* lfs: true
* lfs in the right spot?
* console doesn't need lfs
* all builds that touch self hosted server can use lfs
* don't ever bother trying to use the installed compiler
* simplify and print a little more info
* remove old submodule
* add build tools submodule
* fix path
* we don't need lfs
* no need to test compiler
* set a branch
* allow passing compiler, auto-submodule if missing
* missing endif