Play with config file for build bot

.travis.yml

@@ -10,9 +10,14 @@ addons:
       - g++-4.8
       - cmake
 
+env:
+  - CC=gcc-4.8
+  - CXX=g++4.8
+
 script:
   - cd build
   - cmake .. -DANKI_BUILD_TOOLS=OFF
+  - make -j 2
 
 branches:
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