change test log case

Author: YangSen-qn

library/src/androidTest/java/com/qiniu/android/LogUtilsTest.java

@@ -1,12 +1,15 @@
 package com.qiniu.android;
 
+import android.util.Log;
+
 import com.qiniu.android.utils.LogUtil;
 
 public class LogUtilsTest extends BaseTest {
 
     public void testLog(){
 
         LogUtil.enableLog(true);
+        LogUtil.setLogLevel(Log.VERBOSE);
 
         Throwable throwable = new Throwable();