vendor: update buildkit to v0.19.0-rc1

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

vendor/github.com/aws/aws-sdk-go-v2/internal/middleware/middleware.go

@@ -0,0 +1,42 @@
+package middleware
+
+import (
+	"context"
+	"sync/atomic"
+	"time"
+
+	internalcontext "github.com/aws/aws-sdk-go-v2/internal/context"
+	"github.com/aws/smithy-go/middleware"
+)
+
+// AddTimeOffsetMiddleware sets a value representing clock skew on the request context.
+// This can be read by other operations (such as signing) to correct the date value they send
+// on the request
+type AddTimeOffsetMiddleware struct {
+	Offset *atomic.Int64
+}
+
+// ID the identifier for AddTimeOffsetMiddleware
+func (m *AddTimeOffsetMiddleware) ID() string { return "AddTimeOffsetMiddleware" }
+
+// HandleBuild sets a value for attemptSkew on the request context if one is set on the client.
+func (m AddTimeOffsetMiddleware) HandleBuild(ctx context.Context, in middleware.BuildInput, next middleware.BuildHandler) (
+	out middleware.BuildOutput, metadata middleware.Metadata, err error,
+) {
+	if m.Offset != nil {
+		offset := time.Duration(m.Offset.Load())
+		ctx = internalcontext.SetAttemptSkewContext(ctx, offset)
+	}
+	return next.HandleBuild(ctx, in)
+}
+
+// HandleDeserialize gets the clock skew context from the context, and if set, sets it on the pointer
+// held by AddTimeOffsetMiddleware
+func (m *AddTimeOffsetMiddleware) HandleDeserialize(ctx context.Context, in middleware.DeserializeInput, next middleware.DeserializeHandler) (
+	out middleware.DeserializeOutput, metadata middleware.Metadata, err error,
+) {
+	if v := internalcontext.GetAttemptSkewContext(ctx); v != 0 {
+		m.Offset.Store(v.Nanoseconds())
+	}
+	return next.HandleDeserialize(ctx, in)
+}