os: move ram_session_guard from nic_bridge to os

Issue #1039

repos/os/include/os/ram_session_guard.h

@@ -11,8 +11,8 @@
  * under the terms of the GNU General Public License version 2.
  */
 
-#ifndef _RAM_SESSION_GUARD_H_
-#define _RAM_SESSION_GUARD_H_
+#ifndef _INCLUDE__OS__RAM_SESSION_GUARD_H_
+#define _INCLUDE__OS__RAM_SESSION_GUARD_H_
 
 #include <dataspace/client.h>
 #include <ram_session/ram_session.h>
@@ -60,4 +60,4 @@ class Genode::Ram_session_guard : public Genode::Ram_session
 		size_t used() override { return _used; }
 };
 
-#endif /* _RAM_SESSION_GUARD_H_ */
+#endif /* _INCLUDE__OS__RAM_SESSION_GUARD_H_ */

repos/os/src/server/nic_bridge/component.h

@@ -20,6 +20,7 @@
 #include <nic/packet_allocator.h>
 #include <nic_session/rpc_object.h>
 #include <nic_session/connection.h>
+#include <os/ram_session_guard.h>
 #include <os/session_policy.h>
 #include <root/component.h>
 #include <util/arg_string.h>
@@ -28,7 +29,6 @@
 #include <mac.h>
 #include <nic.h>
 #include <packet_handler.h>
-#include <ram_session_guard.h>
 
 namespace Net {
 	class Stream_allocator;