protobuf: upgraded package to upstream

Upgraded dev-libs/protobuf to version 3.11.4 on amd64
Upgraded dev-python/protobuf-python to version 3.11.4 on amd64

BUG=chromium:1082352
TEST=CQ passes

Cq-Depend: chromium:2199899,chromium:2204675
Change-Id: I51a924edffdbb010c27c7a4e54f8b120057bbba3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2197715
Tested-by: Allen Webb <allenwebb@google.com>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Commit-Queue: Allen Webb <allenwebb@google.com>
17 files changed