syscall: make origRlimitNofile atomic.Pointer[Rlimit]
Currently we are bootstrapping with Go 1.20, origRlimitNofile can
be changed to atomic.Pointer[Rlimit].
Change-Id: I00ce9d1a9030bd5dbd34e3dc6c4e38683a87be86
GitHub-Last-Rev:
f2ccdb38412019d10661ed6be42086b445e411bf
GitHub-Pull-Request: golang/go#63274
Reviewed-on: https://go-review.googlesource.com/c/go/+/531516
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: qiulaidongfeng <2645477756@qq.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>