extract_utils: Fix cleanup variables assigment

The current assignment is wrong, we cleanup the files when we tell
not to do so.

Change-Id: I73a9a17f5ebae6f2dbdc3d6d9aaa28cd75fb4f87

build/tools/extract_utils.sh

@@ -92,7 +92,7 @@ function setup_vendor() {
         COMMON=0
     fi
 
-    if [ "$5" == "true" ] || [ "$5" == "1" ]; then
+    if [ "$5" == "false" ] || [ "$5" == "0" ]; then
         VENDOR_STATE=1
         VENDOR_RADIO_STATE=1
     else