[t:4253] our automake template should use CXX flags instead of C flags, otherwise newer (ie 5.1.61) mysql builds fail trying to give incompatible C flags to the C++ handlerton build


git-svn-id: file:///svn/mysql/tokudb-engine/tokudb-engine@39548 c7de825b-a66e-492c-adef-691d508d4ae1