Underp the backuptool

Change-Id: I2510525701070d8c7e59c26693fb0fdb37453fb3
diff --git a/prebuilt/common/bin/backuptool.sh b/prebuilt/common/bin/backuptool.sh
index c576be3..0ef562f 100755
--- a/prebuilt/common/bin/backuptool.sh
+++ b/prebuilt/common/bin/backuptool.sh
@@ -5,7 +5,7 @@
 
 export C=/tmp/backupdir
 export S=/system
-export V=10.1
+export V=10.2
 
 # Preserve /system/addon.d in /tmp/addon.d
 preserve_addon_d() {