Add shared library version of libcli_main

ports/nacl-spawn/library_dependencies.h

-// Copyright (c) 2014 The Native Client Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef NACL_SPAWN_LIBRARY_DEPENDENCIES_
-#define NACL_SPAWN_LIBRARY_DEPENDENCIES_
-
-#include <string>
-#include <vector>
-
-// Finds shared objects which are necessary to run |filename|.
-// Also finds the architecture string |arch|.
-// Output paths will be stored in |dependencies|. |filename| will be
-// in |dependencies| if |filename| is dynamically linked. Otherwise,
-// |dependencies| will be empty. Returns false and update errno
-// appropriately on error.
-bool FindArchAndLibraryDependencies(const std::string& filename,
-                                    std::string* arch,
-                                    std::vector<std::string>* dependencies);
-
-#endif  // NACL_SPAWN_LIBRARY_DEPENDENCIES_