Adds containerd-shim-runhcs verbose logging support

Revendors to Microsoft/hcsshim v0.7.5 that added support for logging all
runhcs.exe commands via Windows named pipes. This now launches all runhcs.exe
commands and forwards debug logging to the containerd-shim-runhcs log when
with --debug.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>

vendor/github.com/Microsoft/hcsshim/hnsendpoint.go

@@ -6,6 +6,8 @@ import (
 
 // HNSEndpoint represents a network endpoint in HNS
 type HNSEndpoint = hns.HNSEndpoint
+// Namespace represents a Compartment.
+type Namespace = hns.Namespace
 
 //SystemType represents the type of the system on which actions are done
 type SystemType string