[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/meta/meta-mediatek/classes/pack-abupdate-zip.bbclass b/meta/meta-mediatek/classes/pack-abupdate-zip.bbclass
new file mode 100644
index 0000000..63ce430
--- /dev/null
+++ b/meta/meta-mediatek/classes/pack-abupdate-zip.bbclass
@@ -0,0 +1,11 @@
+IMAGE_PATH = "${DEPLOY_DIR_IMAGE}"
+IMAGE_LIST = "${IMAGE_PATH}/boot.img \
+              ${IMAGE_PATH}/system.img "
+DEPENDS += "zip-native"
+
+do_packing_images_post_funcs() {
+    zip -j ${IMAGE_PATH}/abupdate.zip ${IMAGE_LIST}
+}
+
+addtask packing_images_post_funcs after do_avb_sign_img before do_build
+