busybox: Enable LOSETUP and SWITCH_ROOT

These are needed by HDDIMG based boots on x86-based
platforms.

Signed-off-by: Drew Moseley <drew_moseley@mentor.com>
busybox: Enable HALT

This is required by the initrd files in
core-image-minimal-initramfs.

Signed-off-by: Drew Moseley <drew_moseley@mentor.com>
busybox: Enable CONFIG_RESET and CONFIG_RESIZE

Signed-off-by: Drew Moseley <drew_moseley@mentor.com>
Merge pull request #250 from drewmoseley/move-busybox-configs-to-meta-mentor

Extra busybox configs