Add dlwrap.c to binutils to simulate dlopen/dlsym for gold plugin

binutils-2.20/ld/sysdep.h

 /* sysdep.h -- handle host dependencies for the GNU linker
    Copyright 1995, 1996, 1997, 1999, 2002, 2003, 2005, 2007
    Free Software Foundation, Inc.
 
    This file is part of the GNU Binutils.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
@@ skipping 73 matching lines @@
 
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
 #else
 #ifdef HAVE_SYS_FILE_H
 #include <sys/file.h>
 #endif
 #endif
 
 #ifdef HAVE_DLFCN_H
-#include <dlfcn.h>
+#include <dlwrap.h> // @LOCALMOD
 #endif
 
 #ifndef O_RDONLY
 #define O_RDONLY 0
 #endif
 #ifndef O_WRONLY
 #define O_WRONLY 1
 #endif
 #ifndef O_RDWR
 #define O_RDWR 2
@@ skipping 26 matching lines @@
 
 #if !HAVE_DECL_GETENV
 extern char *getenv ();
 #endif
 
 #if !HAVE_DECL_ENVIRON
 extern char **environ;
 #endif
 
 #endif /* ! defined (LD_SYSDEP_H) */