Add recipe for sdk directdisk target

Signed-off-by: Jessica Zhang <jessica.zhang@intel.com>

meta/recipes-sato/images/poky-image-sdk-directdisk.bb

@@ -0,0 +1,9 @@
+require recipes-core/images/poky-image-directdisk.inc
+
+DESCRIPTION = "SDK Direct Disk Image"
+
+LICENSE = "MIT"
+
+ROOTFS = "${DEPLOY_DIR_IMAGE}/poky-image-sdk-${MACHINE}.ext3"
+
+do_bootdirectdisk[depends] += "poky-image-sdk:do_rootfs"