diff.tar.gz doesn't include cmp.exe (next net release preview)

[Kazuhiro Fujieda]

cygwin-net-485/diff/diff.tar.gz doesn't include cmp.exe.
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  | AIST      Kazuhiro Fujieda <fujieda@jaist.ac.jp>
  | HOKURIKU  School of Information Science
o_/ 1990      Japan Advanced Institute of Science and Technology