update to k8s v1.21 and go 1.16

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

@@ -0,0 +1,28 @@
+// Shim for the Host Compute Service (HCS) to manage Windows Server
+// containers and Hyper-V containers.
+
+package hcsshim
+
+import (
+	"syscall"
+
+	"github.com/Microsoft/hcsshim/internal/hcserror"
+)
+
+//go:generate go run mksyscall_windows.go -output zsyscall_windows.go hcsshim.go
+
+//sys SetCurrentThreadCompartmentId(compartmentId uint32) (hr error) = iphlpapi.SetCurrentThreadCompartmentId
+
+const (
+	// Specific user-visible exit codes
+	WaitErrExecFailed = 32767
+
+	ERROR_GEN_FAILURE          = hcserror.ERROR_GEN_FAILURE
+	ERROR_SHUTDOWN_IN_PROGRESS = syscall.Errno(1115)
+	WSAEINVAL                  = syscall.Errno(10022)
+
+	// Timeout on wait calls
+	TimeoutInfinite = 0xFFFFFFFF
+)
+
+type HcsError = hcserror.HcsError