Update buildkit w/ customizable output colors, etc.

Signed-off-by: Sean P. Kane <spkane00@gmail.com>

vendor/github.com/moby/buildkit/solver/errdefs/context.go

@@ -3,11 +3,25 @@ package errdefs
 import (
 	"context"
 	"errors"
+	"strings"
 
 	"github.com/moby/buildkit/util/grpcerrors"
 	"google.golang.org/grpc/codes"
 )
 
-func IsCanceled(err error) bool {
-	return errors.Is(err, context.Canceled) || grpcerrors.Code(err) == codes.Canceled
+func IsCanceled(ctx context.Context, err error) bool {
+	if errors.Is(err, context.Canceled) || grpcerrors.Code(err) == codes.Canceled {
+		return true
+	}
+	// grpc does not set cancel correctly when stream gets cancelled and then Recv is called
+	if err != nil && ctx.Err() == context.Canceled {
+		// when this error comes from containerd it is not typed at all, just concatenated string
+		if strings.Contains(err.Error(), "EOF") {
+			return true
+		}
+		if strings.Contains(err.Error(), context.Canceled.Error()) {
+			return true
+		}
+	}
+	return false
 }