Fixed Travis YAML.

Author: Michael Koval

.travis.yml

@@ -2,7 +2,8 @@ sudo: required
 dist: trusty
 install:
 - export repository='prpy'
-- git clone https://github.com/personalrobotics/pr-cleanroom.git .
+- git clone https://github.com/personalrobotics/pr-cleanroom.git
+- cd pr-cleanroom
 - curl -o https://raw.githubusercontent.com/personalrobotics/pr-rosinstalls/feature/rosdistro/repositories.yml
 - ./internal-setup.sh
 - ./internal-distro.py --workspace=src --repository ${repository} distribution/distribution.yml