Use #pragma hd_warning_disable to accomodate older nvcc.
Use #pragma hd_warning_disable to accomodate older nvcc.

Fixes #688

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