[oe] Initramfs support?

[Rob Kramer]

Hi Cliff,

Cliff Brake wrote:
> - define a custom image or use something like minimal-image
> - add cpio.gz to IMAGE_FSTYPES
> - use the resulting cpio.gz as your initramfs

Thanks, I guess that's the way to go. I was hoping I could modify my main
image (already custom) to also create a cpio.gz, but a second image may be
just as clean. The x270 images are a good reference..

Cheers!

    Rob