Use g++-4.8 for cppcheck building

contrib/codeanalysis/runcppcheck.sh

@@ -4,7 +4,7 @@ pushd ..
 wget http://sourceforge.net/projects/cppcheck/files/cppcheck/1.66/cppcheck-1.66.tar.bz2
 tar -xvf cppcheck-1.66.tar.bz2
 cd cppcheck-1.66
-make -j2
+CXX=g++-4.8 make -j2
 popd
 ../cppcheck-1.66/cppcheck --enable=all -I include --inline-suppr --std=c++11 --platform=unix64 src/main.cpp src/chai*.cpp --template ' - __{severity}__: [{file}:{line}](../blob/TRAVIS_COMMIT/{file}#L{line}) {message} ({id})'  2>output
 sed -i "s/TRAVIS_COMMIT/${TRAVIS_COMMIT}/g" output