build: Update protobuf (#6180)
build: Update protobuf (#6180)

In order to compile envoy for iOS we need this commit
https://github.com/protocolbuffers/protobuf/commit/0894e07536af88065d462cdc9d8e807c0723ef4d
from protobuf. This also includes the previous commits that required us
to use a non-release version.

Signed-off-by: Keith Smiley <cadcacca0656fa2178c91a0e61e28374cd3a79c3@gmail.com>
eklitzke/envoy,istio/envoy,istio/envoy,envoyproxy/envoy,lyft/envoy,eklitzke/envoy,dnoe/envoy,envoyproxy/envoy,envoyproxy/envoy,lizan/envoy,istio/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,lizan/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,jrajahalme/envoy,dnoe/envoy,envoyproxy/envoy-wasm,istio/envoy,envoyproxy/envoy,envoyproxy/envoy,lizan/envoy,jrajahalme/envoy,envoyproxy/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm,jrajahalme/envoy,istio/envoy,envoyproxy/envoy-wasm,istio/envoy,dnoe/envoy,dnoe/envoy,eklitzke/envoy,jrajahalme/envoy,lyft/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,istio/envoy,lyft/envoy,lizan/envoy,envoyproxy/envoy,envoyproxy/envoy,dnoe/envoy,lizan/envoy,lizan/envoy,lyft/envoy,envoyproxy/envoy-wasm,eklitzke/envoy,eklitzke/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm