Another attempt at getting good debug output from Travis.

.travis.yml

@@ -13,7 +13,8 @@ before_install:
   - sudo apt-get autoremove
   - sudo apt-get autoclean
   - sudo rm -rf /var/lib/mysql
-  - sudo rm -rf /var/log/mysql
+  - sudo truncate -s 0 /var/log/mysql/error.log
+  - sudo truncate -s 0 /var/log/mysql/slow.log
 
 install:
   # Install Ansible.
@@ -38,7 +39,6 @@ script:
 
   # Some MySQL debugging (show all the logs).
   - "sudo ls -lah /var/log"
-  - "sudo ls -lah /var/log/mysql"
   - "sudo cat /var/log/mysql/error.log"
   - "sudo cat /var/log/mysql/slow.log"