vendor: uprev 9 to 10

Change-Id: I776275c981e95613a4fdacfd42b3f77fdafb6219
diff --git a/prebuilt/common/bin/backuptool_ab.functions b/prebuilt/common/bin/backuptool_ab.functions
index a4d1ada..01a9b5f 100644
--- a/prebuilt/common/bin/backuptool_ab.functions
+++ b/prebuilt/common/bin/backuptool_ab.functions
@@ -5,7 +5,7 @@
 
 export S=/system
 export C=/postinstall/tmp/backupdir
-export V=9
+export V=10
 export backuptool_ab=true
 
 copy_file() {