Update path to package template

Change-Id: I2671dcb5050f3d81af9d1c12d03c6a2886f7f81f
diff --git a/BUILD.gn b/BUILD.gn
index ffedb30..3717ede 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -27,7 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import("//packages/package.gni")
+import("//build/package.gni")
 
 package("iperf") {
   system_image = true