fix(test) add #if guard to exclude test related files from the build

tests/unity/unity.h

@@ -3,7 +3,7 @@
     Copyright (c) 2007-21 Mike Karlesky, Mark VanderVoord, Greg Williams
     [Released under MIT License. Please refer to license.txt for details]
 ========================================== */
-
+#if LV_BUILD_TEST
 #ifndef UNITY_FRAMEWORK_H
 #define UNITY_FRAMEWORK_H
 #define UNITY
@@ -659,3 +659,5 @@ void verifyTest(void);
 }
 #endif
 #endif
+
+#endif /*LV_BUILD_TEST*/