Guard the existence of sequential::malloc & sequential::free with __CUDA_ARCH__.
Guard the existence of sequential::malloc & sequential::free with __CUDA_ARCH__.

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