Update .travis.yml

Author: drinckes

.travis.yml

@@ -1,5 +1,11 @@
 matrix:
   include:
+    - language: cpp
+      script:
+        - wget -O install.sh "https://github.com/bazelbuild/bazel/releases/download/0.5.3/bazel-0.5.3-installer-linux-x86_64.sh"
+        - chmod +x install.sh
+        - ./install.sh --user && rm -f install.sh
+        - ~/bin/bazel test --test_output=all cpp:openlocationcode_test
     #- language: dart
     #  dart: stable
     #  script: