vendor: update buildkit

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

vendor/github.com/moby/buildkit/frontend/gateway/pb/exit.go

@@ -0,0 +1,53 @@
+package moby_buildkit_v1_frontend //nolint:golint
+
+import (
+	"fmt"
+
+	"github.com/containerd/typeurl"
+	"github.com/moby/buildkit/util/grpcerrors"
+)
+
+const (
+	// UnknownExitStatus might be returned in (*ExitError).ExitCode via
+	// ContainerProcess.Wait.  This can happen if the process never starts
+	// or if an error was encountered when obtaining the exit status, it is set to 255.
+	//
+	// This const is defined here to prevent importing github.com/containerd/containerd
+	// and corresponds with https://github.com/containerd/containerd/blob/40b22ef0741028917761d8c5d5d29e0d19038836/task.go#L52-L55
+	UnknownExitStatus = 255
+)
+
+func init() {
+	typeurl.Register((*ExitMessage)(nil), "github.com/moby/buildkit", "gatewayapi.ExitMessage+json")
+}
+
+// ExitError will be returned when the container process exits with a non-zero
+// exit code.
+type ExitError struct {
+	ExitCode uint32
+	Err      error
+}
+
+func (err *ExitError) ToProto() grpcerrors.TypedErrorProto {
+	return &ExitMessage{
+		Code: err.ExitCode,
+	}
+}
+
+func (err *ExitError) Error() string {
+	if err.Err != nil {
+		return err.Err.Error()
+	}
+	return fmt.Sprintf("exit code: %d", err.ExitCode)
+}
+
+func (err *ExitError) Unwrap() error {
+	return err.Err
+}
+
+func (e *ExitMessage) WrapError(err error) error {
+	return &ExitError{
+		Err:      err,
+		ExitCode: e.Code,
+	}
+}