Fix backup

- We are Bliss

Change-Id: I58641c40eff21d302265ef48fa951a8bb2f36fc2
diff --git a/prebuilt/common/bin/backuptool.sh b/prebuilt/common/bin/backuptool.sh
index 73f1f6e..1b6c2f9 100755
--- a/prebuilt/common/bin/backuptool.sh
+++ b/prebuilt/common/bin/backuptool.sh
@@ -48,7 +48,7 @@
 if [ ! -r $S/build.prop ]; then
     return 0
 fi
-if ! grep -q "^ro.lineage.version=$V.*" $S/build.prop; then
+if ! grep -q "^ro.bliss.version=$V.*" $S/build.prop; then
   echo "Not backing up files from incompatible version: $V"
   return 0
 fi