Make NELEMS type-safe

Change-Id: I867271665b3c595dc40ac63e93e68c87dc213d08
diff --git a/native/jni/NativeFileList.mk b/native/jni/NativeFileList.mk
index 1031903..ce39752 100644
--- a/native/jni/NativeFileList.mk
+++ b/native/jni/NativeFileList.mk
@@ -101,4 +101,5 @@
         time_keeper.cpp)
 
 LATIN_IME_CORE_TEST_FILES := \
+    defines_test.cpp \
     utils/autocorrection_threshold_utils_test.cpp