lmkd: turn on -Werror

- Deal with some -Wunused issues

Change-Id: Id037c44a0ca2d00ae10a939fb001bc24a3e9410c
diff --git a/lmkd/Android.mk b/lmkd/Android.mk
index 5d6d1d2..02d2754 100644
--- a/lmkd/Android.mk
+++ b/lmkd/Android.mk
@@ -4,6 +4,7 @@
 LOCAL_SRC_FILES := lmkd.c
 LOCAL_STATIC_LIBRARIES := libcutils liblog libm libc
 LOCAL_FORCE_STATIC_EXECUTABLE := true
+LOCAL_CFLAGS := -Werror
 
 LOCAL_MODULE := lmkd