message: Updating the cmake version of cub to reflect bazel version.
diff: # ==============================================================================
  include (ExternalProject)
  -set(cub_URL http://mirror.bazel.build/github.com/NVlabs/cub/archive/1.6.4.zip)
  -set(cub_HASH SHA256=966d0c4f41e2bdc81aebf9ccfbf0baffaac5a74f00b826b06f4dee79b2bb8cee)
  +set(cub_URL http://mirror.bazel.build/github.com/NVlabs/cub/archive/69ceda618313df8e9cac6659d607b08949455d14.tar.gz)
  +set(cub_HASH SHA256=87e856522c283b8ea887c3b61d7d5b252d2dd74abac4f1d756d776e721223e82)
  set(cub_BUILD ${CMAKE_CURRENT_BINARY_DIR}/cub/src/cub)
  set(cub_INCLUDE_DIR ${CMAKE_CURRENT_BINARY_DIR}/cub/src/cub)
  set(cub_ARCHIVE_DIR ${CMAKE_CURRENT_BINARY_DIR}/external/cub_archive)
  