Bump moby/buildkit

Signed-off-by: ulyssessouza <ulyssessouza@gmail.com>

vendor/github.com/containerd/fifo/fifo.go

@@ -147,7 +147,7 @@ func OpenFifo(ctx context.Context, fn string, flag int, perm os.FileMode) (io.Re
 // Read from a fifo to a byte array.
 func (f *fifo) Read(b []byte) (int, error) {
 	if f.flag&syscall.O_WRONLY > 0 {
-		return 0, errors.New("reading from write-only fifo")
+		return 0, ErrRdFrmWRONLY
 	}
 	select {
 	case <-f.opened:
@@ -158,14 +158,14 @@ func (f *fifo) Read(b []byte) (int, error) {
 	case <-f.opened:
 		return f.file.Read(b)
 	case <-f.closed:
-		return 0, errors.New("reading from a closed fifo")
+		return 0, ErrReadClosed
 	}
 }
 
 // Write from byte array to a fifo.
 func (f *fifo) Write(b []byte) (int, error) {
 	if f.flag&(syscall.O_WRONLY|syscall.O_RDWR) == 0 {
-		return 0, errors.New("writing to read-only fifo")
+		return 0, ErrWrToRDONLY
 	}
 	select {
 	case <-f.opened:
@@ -176,7 +176,7 @@ func (f *fifo) Write(b []byte) (int, error) {
 	case <-f.opened:
 		return f.file.Write(b)
 	case <-f.closed:
-		return 0, errors.New("writing to a closed fifo")
+		return 0, ErrWriteClosed
 	}
 }