dev-go/go-sys: Update the package to v0.5.0.

Updating dev-go/net has a dependency on some functions of dev-go/go-sys
which are not present in the version we used. Therefore, update the
dev-go/go-sys package to v0.5.0 so that dev-go/net dependencies are
satisfied.

BUG=b/270401364, b/270400767
TEST=presubmit
RELEASE_NOTE=Updated dev-go/go-sys to v0.5.0.

Change-Id: I341258fc1975ce9d90cdc430b948afd407053865
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/43469
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
4 files changed