Move numa.{h, cc} to c10/util (#15024)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15024
Pull Request resolved: https://github.com/pytorch/pytorch/pull/14393
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Reviewed By: dzhulgakov
Differential Revision: D13380559
fbshipit-source-id: abc3fc7321cf37323f756dfd614c7b41978734e4
