enable gcplogs driver on windows

Signed-off-by: Taylan Isikdemir <taylani@google.com>

daemon/logdrivers_windows.go

@@ -6,6 +6,7 @@ import (
 	_ "github.com/docker/docker/daemon/logger/awslogs"
 	_ "github.com/docker/docker/daemon/logger/etwlogs"
 	_ "github.com/docker/docker/daemon/logger/fluentd"
+	_ "github.com/docker/docker/daemon/logger/gcplogs"
 	_ "github.com/docker/docker/daemon/logger/gelf"
 	_ "github.com/docker/docker/daemon/logger/jsonfilelog"
 	_ "github.com/docker/docker/daemon/logger/logentries"