[회원가입][Common] clear edit text 라이센스 추후 검토, 출처 추가

app/src/main/java/kr/co/zumo/app/lifeplus/view/custom/ClearEditText.java

@@ -24,6 +24,8 @@ import kr.co.zumo.app.R;
  * @history 하세미   [2018-09-17]   [최초 작성]
  * @since 2018-09-17
  */
+
+// TODO: license 확인  http://gun0912.tistory.com/56
 public class ClearEditText extends AppCompatEditText implements TextWatcher, View.OnTouchListener, View.OnFocusChangeListener {
 
   private Drawable clearDrawable;