Adds a recipe to https://gitlab.redox-os.org/redox-os/ramfs, which is a ramfs with write support (unlike
initfs: which seems to silently discard writes). Some drivers that are spawned before redoxfs gets to initialize the
file: scheme, like
redoxfs itself, might want some proper logging, which this scheme allows.
This daemon is also supposed to be included in the initfs, so that it can be spawned before pcid is initialized.