lineage: Complete the rebrand

* TODO: Rebrand cmsdk when it's in a working state

Change-Id: I0d8d573f9e0032110ae3a0f54ebe11a877b83137
diff --git a/prebuilt/common/bin/backuptool.functions b/prebuilt/common/bin/backuptool.functions
index 4528a33..dd867c0 100644
--- a/prebuilt/common/bin/backuptool.functions
+++ b/prebuilt/common/bin/backuptool.functions
@@ -5,7 +5,7 @@
 
 export C=/tmp/backupdir
 export S=/system
-export V=14.1
+export V=15.0
 
 copy_file() {
   cp -dp "$1" "$2"