vendor: update buildkit with typed errors support

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

vendor/github.com/tonistiigi/fsutil/Dockerfile

@@ -0,0 +1,29 @@
+#syntax=docker/dockerfile:1.1-experimental
+ARG GO_VERSION=1.13
+
+FROM --platform=amd64 tonistiigi/xx:golang AS goxx
+
+FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine AS base
+RUN apk add --no-cache gcc musl-dev
+COPY --from=goxx / /
+WORKDIR /src
+
+FROM base AS build
+ARG TARGETPLATFORM
+RUN --mount=target=. \
+    --mount=target=/root/.cache,type=cache \
+    go build ./...
+
+FROM base AS test
+RUN --mount=target=. \
+    --mount=target=/root/.cache,type=cache \
+    go test -test.v ./...
+
+FROM base AS test-noroot
+RUN mkdir /go/pkg && chmod 0777 /go/pkg
+USER 1000:1000
+RUN --mount=target=. \
+    --mount=target=/tmp/.cache,type=cache \
+    GOCACHE=/tmp/gocache go test -test.v ./...
+
+FROM build