Changed how we specify C++ version on Linux.
Changed how we specify C++ version on Linux.

yonglehou/hadouken,Robo210/hadouken,vktr/hadouken,vktr/hadouken,Robo210/hadouken,Robo210/hadouken,vktr/hadouken,Robo210/hadouken,yonglehou/hadouken,vktr/hadouken,yonglehou/hadouken