os: add ModeCharDevice to ModeType

When masking FileInfo.Mode() from a character device with the ModeType
mask, ModeCharDevice cannot be recovered.

ModeCharDevice was added https://golang.org/cl/5531052, but nothing
indicates why it was omitted from ModeType. Add it now.

Fixes #27640

Change-Id: I52f56108b88b1b0a5bc6085c66c3c67e10600619
Reviewed-on: https://go-review.googlesource.com/135075
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2 files changed
tree: 7bf6c1addea8685e3cb2d0f03e6d2ec9bc4f2ceb
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. CONTRIBUTING.md
  12. CONTRIBUTORS
  13. favicon.ico
  14. LICENSE
  15. PATENTS
  16. README.md
  17. robots.txt
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