* Add squashfs with LZ4 and LZO compression to Barebox
* Add squashfs with LZO compression to U-Boot
* Use squashfs for Linux kernel partition
Generate a squashfs image with LZO compression for the Linux kernel
partition. Adjust the boot scripts to be file system independent commands
to boot from squashfs.
When booting the HassOS VMDK appliance disk image on QEMU with OVMF UEFI
firmware, barebox numbers devices differently from other environments.
This patch makes the barebox `sh` implementation expand a pathname
wildcard at runtime, so that assigned disk indices != 0 will also work.
This fix introduces a potential (but most likely irrelevant)
bug/problem: If there is more than one disk connected to the system with
a matching name assigned, the wildcard will expand to two or more
pathnames, breaking the resulting `mount` command.
