no more warnings caused by -std=c++11 when building tests/examples
no more warnings caused by -std=c++11 when building tests/examples

sarvex/thrust,GrimDerp/thrust,mohamed-ali/thrust,zeryx/thrust,thvasilo/thrust,xiongzhanblake/thrust,Ricardo666666/thrust,thvasilo/thrust,GrimDerp/thrust,dachziegel/thrust,xiongzhanblake/thrust_src,marksantos/thrust,xiongzhanblake/thrust_src,arnabgho/thrust,zeryx/thrust,mohamed-ali/thrust,zhenglaizhang/thrust,arnabgho/thrust,egaburov/thrust,zeryx/thrust,sdalton1/thrust,sarvex/thrust,zhenglaizhang/thrust,dachziegel/thrust,raygit/thrust,marksantos/thrust,zhenglaizhang/thrust,sarvex/thrust,arnabgho/thrust,raygit/thrust,marksantos/thrust,sdalton1/thrust,thvasilo/thrust,egaburov/thrust,xiongzhanblake/thrust,Ricardo666666/thrust,Ricardo666666/thrust,dachziegel/thrust,mohamed-ali/thrust,sdalton1/thrust,xiongzhanblake/thrust,GrimDerp/thrust,xiongzhanblake/thrust_src,egaburov/thrust,raygit/thrust