[][OpenWrt Dev][Add dual-boot features for fstools]

[Description]
Add a new feature for fstools that disables splitting rootfs_data partition
from rootfs partition for rootdisk-type devices.
Also add partition key parsing support (PARTUUID=/PARTLABEL=)

[Release-log]
N/A

Change-Id: Id57707c9b586fc5acdca416e114bdd4dbeadd0f4
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5595597
diff --git a/prepare_sdk.sh b/prepare_sdk.sh
index 16c2ae1..ae48710 100755
--- a/prepare_sdk.sh
+++ b/prepare_sdk.sh
@@ -32,6 +32,7 @@
 sdk_patch
 #cp mtk target to OpenWRT
 cp -fpR ${MTK_FEEDS_DIR}/target ./
+cp -fpR ${MTK_FEEDS_DIR}/package ./
 #remove patch if choose to not "keep" patch
 if [ -z ${2} ]; then
 	remove_patches