init.huawei.rc: add flash_recovery service

Easiest way of letting people root right now without the init.d
stuff merged. Both 4.3 Superuser apps have flashable zips that replace
this file to run the daemon.

ramdisk/init.huawei.rc

@@ -231,6 +231,10 @@ service setwifimac /system/bin/setwifimac
     disabled
     oneshot
 
+service flash_recovery /system/etc/install-recovery.sh
+    class main
+    oneshot
+
 service wpa_supplicant /system/bin/wpa_supplicant -Dnl80211 -ieth0 -puse_p2p_group_interface=1 -W -c/data/misc/wifi/wpa_supplicant.conf
     class main
     group wifi inet