[][openwrt][common][build][Fix autobuild fail]

[Description]
Fix autobuild flow fail due to 21.02 feed config updated

[Release-log]
N/A

Change-Id: Idd05a90dbdb01b520dcea518b4335cb775ef0957
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6439609
diff --git a/autobuild_mac80211_release/lede-build-sanity.sh b/autobuild_mac80211_release/lede-build-sanity.sh
index 5603507..3276ce0 100755
--- a/autobuild_mac80211_release/lede-build-sanity.sh
+++ b/autobuild_mac80211_release/lede-build-sanity.sh
@@ -26,6 +26,10 @@
 fi
 
 OPENWRT_VER=`cat ${BUILD_DIR}/feeds.conf.default | grep "src-git packages" | awk -F ";openwrt" '{print $2}'`
+if [ -z ${OPENWRT_VER} ]; then
+	OPENWRT_VER=`cat ${BUILD_DIR}/feeds.conf.default | grep "src-git-full packages" | awk -F ";openwrt" '{print $2}'`
+fi
+
 cp ${BUILD_DIR}/feeds.conf.default ${BUILD_DIR}/feeds.conf.default_ori
 
 clean() {