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

binutils-2.20/gold/Makefile.in

Index: binutils-2.20/gold/Makefile.in
===================================================================
--- a/binutils-2.20/gold/Makefile.in
+++ b/binutils-2.20/gold/Makefile.in
@@ -81,7 +81,7 @@
 	incremental.$(OBJEXT) int_encoding.$(OBJEXT) layout.$(OBJEXT) \
 	mapfile.$(OBJEXT) merge.$(OBJEXT) object.$(OBJEXT) \
 	options.$(OBJEXT) output.$(OBJEXT) parameters.$(OBJEXT) \
-	plugin.$(OBJEXT) readsyms.$(OBJEXT) \
+	plugin.$(OBJEXT) dlwrap.$(OBJEXT) readsyms.$(OBJEXT) \
 	reduced_debug_output.$(OBJEXT) reloc.$(OBJEXT) \
 	resolve.$(OBJEXT) script-sections.$(OBJEXT) script.$(OBJEXT) \
 	stringpool.$(OBJEXT) symtab.$(OBJEXT) target.$(OBJEXT) \
@@ -367,7 +367,7 @@
 	@INCINTL@
 
 LIBIBERTY = ../libiberty/libiberty.a
-@PLUGINS_TRUE@LIBDL = -ldl
+@PLUGINS_TRUE@LIBDL = -l:gold-plugin-static.o -lstdc++ -lpthread -ldl
 @THREADS_TRUE@THREADSLIB = -lpthread
 AM_YFLAGS = -d
 
@@ -407,6 +407,7 @@
 	output.cc \
 	parameters.cc \
 	plugin.cc \
+	dlwrap.c \
 	readsyms.cc \
 	reduced_debug_output.cc \
 	reloc.cc \
@@ -453,6 +454,7 @@
 	output.h \
 	parameters.h \
 	plugin.h \
+	dlwrap.h \
 	readsyms.h \
 	reduced_debug_output.h \
 	reloc.h \
@@ -659,6 +661,7 @@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/output.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/parameters.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/plugin.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dlwrap.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/powerpc.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/readsyms.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/reduced_debug_output.Po@am__quote@