Hacky hack to get latest cppcheck on Travis

.travis.yml

@@ -35,8 +35,14 @@ cache:
 
 before_install:
 - sudo apt-get update -qq
-- sudo apt-get install -qq cppcheck
+- sudo apt-get build-dep -qq cppcheck
 - git clone --depth=20 https://github.com/noisymime/cppcheck.git noisymime/cppcheck
+- wget https://github.com/danmar/cppcheck/archive/1.79.zip
+- unzip 1.79.zip
+- cd cppcheck-1.79
+- make
+- sudo make install
+- cd..
 
 install:
     - pip install -U platformio