Disable automatic flymake-cppcheck; this is because flymake-cppcheck
uses flymake-easy, which disables the inbuilt flymake builder. Normally,
I wouldn't care so much - BUT this adds a bit of issue for coworkers
who want to get cppcheck AND syntax check from the compiler. Best to
integrate cppcheck into the check-syntax file for now, and work on the
emacs integration later.