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

binutils-2.20/bfd/configure

 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.64.
 #
 # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
 # 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software
 # Foundation, Inc.
 #
 # This configure script is free software; the Free Software Foundation
 # gives unlimited permission to copy, distribute and modify it.
@@ skipping 15399 matching lines @@
     nlm32_alpha_vec)            tb="$tb nlm32-alpha.lo nlm32.lo nlm.lo"; target_size=64 ;;
     nlm32_i386_vec)             tb="$tb nlm32-i386.lo nlm32.lo nlm.lo" ;;
     nlm32_powerpc_vec)          tb="$tb nlm32-ppc.lo nlm32.lo nlm.lo" ;;
     nlm32_sparc_vec)            tb="$tb nlm32-sparc.lo nlm32.lo nlm.lo" ;;
     or32coff_big_vec)           tb="$tb coff-or32.lo cofflink.lo" ;;
     pc532machaout_vec)          tb="$tb pc532-mach.lo aout-ns32k.lo" ;;
     pc532netbsd_vec)            tb="$tb ns32knetbsd.lo aout-ns32k.lo" ;;
     pef_vec)                    tb="$tb pef.lo" ;;
     pef_xlib_vec)               tb="$tb pef.lo" ;;
     pdp11_aout_vec)             tb="$tb pdp11.lo" ;;
-    plugin_vec)                 tb="$tb plugin.lo" ;;
+    plugin_vec)                 tb="$tb plugin.lo dlwrap.lo" ;;
     pmac_xcoff_vec)             tb="$tb coff-rs6000.lo xcofflink.lo" ;;
     ppcboot_vec)                tb="$tb ppcboot.lo" ;;
     riscix_vec)                 tb="$tb aout32.lo riscix.lo" ;;
     rs6000coff64_vec)           tb="$tb coff64-rs6000.lo xcofflink.lo aix5ppc-core.lo"; target_size=64 ;;
     rs6000coff_vec)             tb="$tb coff-rs6000.lo xcofflink.lo" ;;
     shcoff_small_vec)           tb="$tb coff-sh.lo cofflink.lo" ;;
     shcoff_vec)                 tb="$tb coff-sh.lo cofflink.lo" ;;
     shlcoff_small_vec)          tb="$tb coff-sh.lo cofflink.lo" ;;
     shlcoff_vec)                tb="$tb coff-sh.lo cofflink.lo" ;;
     shlpe_vec)                  tb="$tb pe-sh.lo coff-sh.lo peigen.lo cofflink.lo" ;;
@@ skipping 3303 matching lines @@
   # Use ||, not &&, to avoid exiting from the if with $? = 1, which
   # would make configure fail if this is the last instruction.
   $ac_cs_success || as_fn_exit $?
 fi
 if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
 $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 fi