Include the overlay package

Change-Id: I9252d9a42911591c667750f52cbe6e269ae786a6
Signed-off-by: Vishal Bhoj <vishal.bhoj@linaro.org>
diff --git a/device.mk b/device.mk
index ecee038..e65aac2 100644
--- a/device.mk
+++ b/device.mk
@@ -30,5 +30,8 @@
 
 PRODUCT_CHARACTERISTICS := tablet,nosdcard
 
+DEVICE_PACKAGE_OVERLAYS := \
+    device/linaro/arndale/overlay
+
 $(call inherit-product-if-exists, vendor/samsung_slsi/exynos5250/exynos5250-vendor.mk)
 $(call inherit-product-if-exists, frameworks/native/build/tablet-dalvik-heap.mk)