clang

Add resize kernel for c++ for opencl #456

Job	Run time
linux-x64-clang	6m 47s
linux-x64-clang-constexpr-eval	4m 9s
linux-x64-clang-constexpr-generic-ndarray-eval	5m 57s
linux-x64-clang-constexpr-no-stl-generic-ndarray-eval	5m 7s
linux-x64-clang-index	3m 9s
linux-x64-clang-generic-ndarray	11m 12s
linux-x64-clang-generic-ndarray-eval	7m 0s
linux-x64-clang-index	1m 51s
linux-x64-clang-no-stl	4m 34s
linux-x64-clang-no-stl-generic-ndarray	9m 14s
linux-x64-clang-no-stl-generic-ndarray-eval	5m 58s
	1h 4m 58s

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