Migrate to containerd v1.7.0 and update dependencies

* Updates containerd to v1.7.0 and new binary for 32-bit
Arm OSes.
* Updates Go dependencies - openfaas and external

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

vendor/github.com/Microsoft/hcsshim/internal/log/hook.go

@@ -0,0 +1,45 @@
+package log
+
+import (
+	"github.com/Microsoft/hcsshim/internal/logfields"
+	"github.com/sirupsen/logrus"
+	"go.opencensus.io/trace"
+)
+
+// Hook serves to intercept and format `logrus.Entry`s before they are passed
+// to the ETW hook.
+//
+// The containerd shim discards the (formatted) logrus output, and outputs only via ETW.
+// The Linux GCS outputs logrus entries over stdout, which is consumed by the shim and
+// then re-output via the ETW hook.
+type Hook struct{}
+
+var _ logrus.Hook = &Hook{}
+
+func NewHook() *Hook {
+	return &Hook{}
+}
+
+func (h *Hook) Levels() []logrus.Level {
+	return logrus.AllLevels
+}
+
+func (h *Hook) Fire(e *logrus.Entry) (err error) {
+	h.addSpanContext(e)
+
+	return nil
+}
+
+func (h *Hook) addSpanContext(e *logrus.Entry) {
+	ctx := e.Context
+	if ctx == nil {
+		return
+	}
+	span := trace.FromContext(ctx)
+	if span == nil {
+		return
+	}
+	sctx := span.SpanContext()
+	e.Data[logfields.TraceID] = sctx.TraceID.String()
+	e.Data[logfields.SpanID] = sctx.SpanID.String()
+}