gpu: Add libion to PRODUCT_PACKAGES.

Bug: 32120194
Change-Id: I69cfb94357e62188ab78d884b05e2b99e7b9eed2
diff --git a/device.mk b/device.mk
index 249acca..8979df4 100644
--- a/device.mk
+++ b/device.mk
@@ -209,6 +209,10 @@
     dristat \
     drmstat
 
+# libion
+PRODUCT_PACKAGES += \
+    libion
+
 # Wifi
 PRODUCT_PACKAGES += \
     libwpa_client \