os: allow $HOME to not exist in TestUserHomeDir

This seems like a cleaner fix for the situation Debian has patched
around with
https://sources.debian.org/patches/golang-1.19/1.19.3-1/0001-Disable-test-for-UserHomeDir.patch/

Tested with 'GOCACHE=$(go env GOCACHE) HOME=/home/nobody go test os'.

Change-Id: I9fd00da38b86df2edfcd8cb87629e2875573903e
Reviewed-on: https://go-review.googlesource.com/c/go/+/456126
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2 files changed
tree: 0b9e70c931f0717543b4a3d6625354d96c9de76a
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. codereview.cfg
  11. CONTRIBUTING.md
  12. go.env
  13. LICENSE
  14. PATENTS
  15. README.md
  16. SECURITY.md
README.md

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