fix docker-compose download script

Author: rm-yakovenko

.travis.yml

@@ -4,8 +4,8 @@ services:
   - docker
 
 before_install:
-  - curl -L https://github.com/docker/compose/releases/download/1.16.1/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
-  - chmod +x /usr/local/bin/docker-compose
+  - sudo curl -Lo /usr/local/bin/docker-compose https://github.com/docker/compose/releases/download/1.16.1/docker-compose-`uname -s`-`uname -m`
+  - sudo chmod +x /usr/local/bin/docker-compose
 
 script:
   - XDEBUG=1 docker-compose build