time: add /etc/zoneinfo as valid path for tzdata for NixOS
NixOS has no /usr/share, but does have tzdata at /etc/zoneinfo.
Change-Id: Ic7d7f42a215e06c2e4f5c54ee11db82240f27167
GitHub-Last-Rev:
9969dd3e2cc49b30c3cd6b0858cb60b00bcbdf60
GitHub-Pull-Request: golang/go#58267
Reviewed-on: https://go-review.googlesource.com/c/go/+/464995
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>