Update path to package template

Change-Id: I94cffd9c9787588b556f6383fd348b692deb0677

BUILD.gn

diff --git a/BUILD.gn b/BUILD.gn
index 9b511b6..c10a505 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//packages/package.gni")
+import("//build/package.gni")
 
 package("lua") {
   system_image = true