message: Add conditions:default to mkl build
  If building on a system that is not darwin, linux_x86_64, or
  windows, the select statement in third_party/mkl/BUILD fails to
  find a match and fails. Need to use no mkl libraries for non-x86
  systems
  Fixes
diff: @@ -34,6 +34,7 @@ filegroup(
  "@org_tensorflow//tensorflow:windows": [
  "@mkl_windows//:LICENSE",
  ],
  + "//conditions:default": []
  }),
  visibility = ["//visibility:public"],
  )
  @@ -54,5 +55,6 @@ cc_library(
  "@mkl_windows//:mkl_headers",
  "@mkl_windows//:mkl_libs_windows",
  ],
  + "//conditions:default": []
  }),
  )
  