WIFI-2152: Allow re-trying a failed upgrade

feeds/wlan-ap/opensync/files/bin/flash-firmware

@@ -40,6 +40,8 @@ uci commit
 /sbin/sysupgrade $IMGFILE
 if [ "$?" != "0" ] ; then
   echo "$0: Sysupgrade failed."
+  rm /tmp/sysupgrade.meta
+  rm /tmp/upgrade.*
   exit 1
 fi
 

feeds/wlan-ap/opensync/patches/39-allow-upgrade-retry.patch

@@ -0,0 +1,12 @@
+--- a/src/um/src/um_ovsdb.c
++++ b/src/um/src/um_ovsdb.c
+@@ -356,7 +356,8 @@ static void callback_AWLAN_Node(
+                 //TODO Is there something that needs to be done here?
+             }
+ 
+-            if(awlan_node->upgrade_timer_changed){
++            if(awlan_node->upgrade_timer_changed
++                || ((awlan_node->firmware_url_changed) && (strlen(awlan_node->firmware_url) > 0))) {
+                 if (awlan_node->upgrade_timer > 0)
+                 {
+                     /* if there is active timer, stop it to set new value   */