fix(coreos-init): start splitting startup into multiple units

This is the first round of splitting up the coreos_startup script into
multiple units, starting with using systemd to mount the state and oem
partitions. This lets us use systemd to get device dependencies right.

Also cleanup whitespace, I forgot ebuild style requires tab characters.
Sync up -9999 version which I missed in previous commits.
fix(coreos-base/coreos-base): remove /var/run from fstab

No longer needed as systemd is installed with a unit to bind /var/run to
/run which is always a tmpfs mount. Binding the two seems cleaner.
fix(coreos-init): code fix for new path to coreos_startup
Merge pull request #5 from marineam/resize-state

Resize state updates