Fix proguard flag file dependency.

Change-Id: Ie0d23dbc6e8f6d4d17ce1111de51cb5695d7acdd
diff --git a/Android.mk b/Android.mk
index 4604e42..1be3f23 100644
--- a/Android.mk
+++ b/Android.mk
@@ -8,6 +8,6 @@
 LOCAL_PACKAGE_NAME := Provision
 LOCAL_CERTIFICATE := platform
 
-LOCAL_PROGUARD_FLAGS := -include $(LOCAL_PATH)/proguard.flags
+LOCAL_PROGUARD_FLAG_FILES := proguard.flags
 
 include $(BUILD_PACKAGE)