change travis.yml

Author: YangSen-qn

.travis.yml

@@ -37,7 +37,7 @@ before_script:
 script:
   - ./gradlew build
   - ./gradlew :library:createDebugAndroidTestCoverageReport --info --stacktrace
-  - ./gradlew connectedAndroidTest  --info
+  - ./gradlew connectedAndroidTest  --info --stacktrace
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)