curl: upgraded package to upstream Upgraded net-misc/curl to version 8.4.0 on amd64 BUG=b/304681801 TEST=presubmit RELEASE_NOTE=Upgraded net-misc/curl to version 8.4.0. This resolves CVE-2023-38545. cos-patch: security-high Change-Id: I4ccc8be58183cfce17fa15d1b42557bb7ecea541 Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/portage-stable/+/59095 Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com> Main-Branch-Verified: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com> Reviewed-by: Arnav Kansal <rnv@google.com>