Fixed acc kernels directive mistake
Fixed acc kernels directive mistake

MMp131316/code-samples,xiongzhanblake/code-samples,MMp131316/code-samples,MMp131316/code-samples,xiongzhanblake/code-samples,xiongzhanblake/code-samples,MMp131316/code-samples,xiongzhanblake/code-samples,xiongzhanblake/code-samples,xiongzhanblake/code-samples,xiongzhanblake/code-samples,MMp131316/code-samples,MMp131316/code-samples,MMp131316/code-samples