zenfone8: Start building vendor

Change-Id: Ifbf45bbee47f7cf16b6549445d22174c4b071f60
diff --git a/setup-makefiles.sh b/setup-makefiles.sh
index 739edb7..31571d2 100755
--- a/setup-makefiles.sh
+++ b/setup-makefiles.sh
@@ -49,6 +49,8 @@
 
 write_makefiles "$MY_DIR"/proprietary-files-product.txt
 
+write_makefiles "$MY_DIR"/proprietary-files-vendor.txt
+
 cat << EOF >> "$ANDROIDMK"
 
 EOF