omni: backuptool.sh: Android 13

Change-Id: I6d7e521d3a25bf692d942d3db9dac3b2a4db3f63
diff --git a/prebuilt/common/bin/backuptool.sh b/prebuilt/common/bin/backuptool.sh
index eda5d38..bf1bc95 100755
--- a/prebuilt/common/bin/backuptool.sh
+++ b/prebuilt/common/bin/backuptool.sh
@@ -5,7 +5,7 @@
 
 export C=/tmp/backupdir
 export S=$2
-export V=12
+export V=13
 
 export ADDOND_VERSION=1