Add additional files into initramfs when debug-shell is installed
This PR uses the same approach as the Alpine's mkinitfs (also discussed in https://github.com/postmarketOS/pmbootstrap/issues/1188#issuecomment-363897670) to add the possibility to the hooks
to include additional binaries to the initramfs
.
The mkinitfs
script search the *.files
in the path /etc/postmarketos-mkinitfs/files/
and each line of those files is a binary file that has to be added to the initramfs
.
Right now only the debug-shell
hook uses this approach to add some files mentioned in #785 that are useful for the kernel mainlining process.