Update travis.yml to fix problem with permission denied

Zomis · Zomis · commit 771de6dc8624 · 2016-02-11T18:21:25.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -8,5 +8,7 @@ before_install:
 
 install:
     - cd duga-core
+    - chmod +x gradlew
     - ./gradlew install
+    - cd ..
 
