Images fail to boot without vfscore/cpio

Without these options
```
    - CONFIG_LIBCPIO=y
    - CONFIG_LIBINITRAMFS=y
    - CONFIG_LIBDEVFS_AUTOMOUNT=y
    - CONFIG_LIBVFSCORE_AUTOMOUNT_ROOTFS=y
    - CONFIG_LIBVFSCORE_ROOTFS_RAMFS=y
```
images seem to be improperly laid out and fail to boot. This is probably a linker script bug.

Workaround for now: enable them and you should be fine.