zstd: upgraded package to upstream

Upgraded app-arch/zstd to version 1.5.0 on amd64
Removed workaround from Gentoo bug https://bugs.gentoo.org/713940.
This bug was fixed upstream and the fix is included, so the
workaround can be removed from this build.

TEST=Verified functionality on device

Change-Id: I80d6f88eda89f50ab7ab1672b476af380e48f7dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3192165
Reviewed-by: Mike Wiitala <mwiitala@google.com>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Tested-by: Parker Holloway <jparkerh@google.com>
Commit-Queue: Parker Holloway <jparkerh@google.com>
5 files changed