libgcrypt: upgraded package to upstream

Upgraded dev-libs/libgcrypt to version 1.9.4 on amd64, arm64

BUG=b/200139111
TEST=presubmit
RELEASE_NOTE=Upgraded libgcrypt to 1.9.4. This fixes CVE-2021-40528

cos-patch: lts-refresh
Change-Id: I8d72c0491478cf3559eda388c9e98903aca834f3
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/portage-stable/+/24051
Reviewed-by: Varsha Teratipally <teratipally@google.com>
Reviewed-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
Main-Branch-Verified: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
4 files changed