vendor: update hcsshim to v0.6.11

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

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

@@ -72,6 +72,22 @@ var (
 	ErrPlatformNotSupported = errors.New("unsupported platform request")
 )
 
+type EndpointNotFoundError struct {
+	EndpointName string
+}
+
+func (e EndpointNotFoundError) Error() string {
+	return fmt.Sprintf("Endpoint %s not found", e.EndpointName)
+}
+
+type NetworkNotFoundError struct {
+	NetworkName string
+}
+
+func (e NetworkNotFoundError) Error() string {
+	return fmt.Sprintf("Network %s not found", e.NetworkName)
+}
+
 // ProcessError is an error encountered in HCS during an operation on a Process object
 type ProcessError struct {
 	Process   *process
@@ -174,6 +190,12 @@ func makeProcessError(process *process, operation string, extraInfo string, err
 // will currently return true when the error is ErrElementNotFound or ErrProcNotFound.
 func IsNotExist(err error) bool {
 	err = getInnerError(err)
+	if _, ok := err.(EndpointNotFoundError); ok {
+		return true
+	}
+	if _, ok := err.(NetworkNotFoundError); ok {
+		return true
+	}
 	return err == ErrComputeSystemDoesNotExist ||
 		err == ErrElementNotFound ||
 		err == ErrProcNotFound