os: fix reference to nonexistent errors.Wrapper
os: fix reference to nonexistent errors.Wrapper

Change-Id: I857d39486cbddbbee0c00fd45eb77f21488f4806
GitHub-Last-Rev: 1b500183cfebadffb4c183e56850bfb794a11703
GitHub-Pull-Request: golang/go#35399
Reviewed-on: https://go-review.googlesource.com/c/go/+/205602
Reviewed-by: Jonathan Amsterdam <e3d3698b2ccd5955e4adf250d0785062d0f9018b@google.com>

cloudflare/go,akutz/go,akutz/go,akutz/go,cloudflare/go,cloudflare/go,golang/go,CAFxX/go,golang/go,golang/go,golang/go,nawawi/go,cloudflare/go,akutz/go,golang/go,akutz/go,cloudflare/go,cloudflare/go,golang/go,nawawi/go,akutz/go,nawawi/go,CAFxX/go,CAFxX/go,nawawi/go,CAFxX/go,nawawi/go,CAFxX/go,cloudflare/go,golang/go,golang/go,cloudflare/go,akutz/go,CAFxX/go,CAFxX/go,nawawi/go,nawawi/go,nawawi/go,akutz/go,CAFxX/go