hack: update proto generators for arm64

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

hack/dockerfiles/generated-files.Dockerfile

@@ -8,7 +8,12 @@ ARG GOGO_VERSION=v1.3.2
 RUN apt-get update && apt-get --no-install-recommends install -y \
 	unzip \
 	&& true
-RUN wget -q https://github.com/google/protobuf/releases/download/v${PROTOC_VERSION}/protoc-${PROTOC_VERSION}-linux-x86_64.zip && unzip protoc-${PROTOC_VERSION}-linux-x86_64.zip -d /usr/local
+
+ARG TARGETOS TARGETARCH
+RUN set -e; \
+	if [ "$TARGETARCH" = "amd64" ]; then TARGETARCH=x86_64; fi; \
+	if [ "$TARGETARCH" = "arm64" ]; then TARGETARCH=aarch_64; fi; \
+	wget -q https://github.com/google/protobuf/releases/download/v${PROTOC_VERSION}/protoc-${PROTOC_VERSION}-${TARGETOS}-${TARGETARCH}.zip && unzip protoc-${PROTOC_VERSION}-${TARGETOS}-${TARGETARCH}.zip -d /usr/local
 
 RUN git clone https://github.com/gogo/protobuf.git /go/src/github.com/gogo/protobuf \
 	&& cd /go/src/github.com/gogo/protobuf \
@@ -30,16 +35,16 @@ WORKDIR /go/src/github.com/moby/buildkit
 # export`.
 FROM gobuild-base AS generated
 RUN mkdir /generated-files
-RUN --mount=target=/tmp/src \
+RUN --mount=target=/tmp/src && \
 	cp -r /tmp/src/. . && \
 	git add -A && \
-	go generate ./... && \
+	go generate -mod=vendor -v ./... && \
 	git ls-files -m --others -- **/*.pb.go | tar -cf - --files-from - | tar -C /generated-files -xf -
 
 FROM scratch AS update
 COPY --from=generated /generated-files /generated-files
 
 FROM gobuild-base AS validate
-RUN --mount=target=/tmp/src \
+RUN --mount=target=/tmp/src && \
 	cp -r /tmp/src/. . && \
-	go generate ./... && git diff && ./hack/validate-generated-files check
+	go generate -mod=vendor ./... -v && git diff && ./hack/validate-generated-files check