Compile cmocka on travis

.travis.yml

@@ -12,6 +12,10 @@ env:
         - CCACHE_CPP2=yes
 
 before_install:
+    - git clone git://git.cryptomilk.org/projects/cmocka.git
+    - cd cmocka && mkdir build && cd build
+    - cmake .. && make -j2 && sudo make install
+    - cd ../..
     - echo -n | openssl s_client -connect https://scan.coverity.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' | sudo tee -a /etc/ssl/certs/ca-
     - sudo add-apt-repository -y ppa:zoogie/sdl2-snapshots
     - sudo add-apt-repository -y ppa:george-edison55/cmake-3.x
@@ -29,7 +33,6 @@ before_install:
 install:
     - sudo apt-get install -y libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libsdl2-ttf-dev
     - sudo apt-get install -y cmake cmake-data lua5.2 liblua5.2-dev
-    #- sudo apt-get install -y libcmocka0 libcmocka-dev
 
 script:
     - mkdir build