[#7] Fix typo in .travis.yml

Author: meatballs

.travis.yml

@@ -9,7 +9,7 @@ install:
   - pip install -r requirements.txt
   - pip install pytest
   - git clone https://github.com/Axelrod-Python/TourExec.git /tmp/TourExec
-  - cd tmp/TourExec
+  - cd /tmp/TourExec
   - make install
 script:
     - pytest