fix typo in default overlay hal

Change-Id: I5313691acee74dfd69639946c01232256b22bc51
diff --git a/modules/overlay/Android.mk b/modules/overlay/Android.mk
index 44b55af..8b7db26 100644
--- a/modules/overlay/Android.mk
+++ b/modules/overlay/Android.mk
@@ -22,5 +22,5 @@
 LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
 LOCAL_SHARED_LIBRARIES := liblog
 LOCAL_SRC_FILES := overlay.cpp
-LOCAL_MODULE := overlay.trout
+LOCAL_MODULE := overlay.default
 include $(BUILD_SHARED_LIBRARY)