Update third_party/binutils to 2.26, add ICF fix

third_party/binutils/plugin-dso-fix.patch

-commit 3c537f7fdb11f02f7082749f3f21dfdd2c2025e8
-Author: Peter Collingbourne <pcc@google.com>
-Date:   Wed Feb 4 09:47:28 2015 -0800
-
-    Resolve forwarding symbols in plugins.
-    
-    2015-02-04  Peter Collingbourne  <pcc@google.com>
-    
-        * plugin.cc (Pluginobj::get_symbol_resolution_info): Resolve
-        forwarding symbols when computing symbol resolution info for plugins.
-
-diff --git a/gold/plugin.cc b/gold/plugin.cc
-index bde8c78..68da8e3 100644
---- a/gold/plugin.cc
-+++ b/gold/plugin.cc
-@@ -914,7 +914,8 @@ is_visible_from_outside(Symbol* lsym)
- // Get symbol resolution info.
- 
- ld_plugin_status
--Pluginobj::get_symbol_resolution_info(int nsyms,
-+Pluginobj::get_symbol_resolution_info(Symbol_table* symtab,
-+                                     int nsyms,
-                                      ld_plugin_symbol* syms,
-                                      int version) const
- {
-@@ -943,6 +944,8 @@ Pluginobj::get_symbol_resolution_info(int nsyms,
-     {
-       ld_plugin_symbol* isym = &syms[i];
-       Symbol* lsym = this->symbols_[i];
-+      if (lsym->is_forwarder())
-+        lsym = symtab->resolve_forwards(lsym);
-       ld_plugin_symbol_resolution res = LDPR_UNKNOWN;
- 
-       if (lsym->is_undefined())
-@@ -1511,14 +1514,16 @@ static enum ld_plugin_status
- get_symbols(const void* handle, int nsyms, ld_plugin_symbol* syms)
- {
-   gold_assert(parameters->options().has_plugins());
--  Object* obj = parameters->options().plugins()->object(
-+  Plugin_manager* plugins = parameters->options().plugins();
-+  Object* obj = plugins->object(
-     static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
-   if (obj == NULL)
-     return LDPS_ERR;
-   Pluginobj* plugin_obj = obj->pluginobj();
-   if (plugin_obj == NULL)
-     return LDPS_ERR;
--  return plugin_obj->get_symbol_resolution_info(nsyms, syms, 1);
-+  Symbol_table* symtab = plugins->symtab();
-+  return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 1);
- }
- 
- // Version 2 of the above.  The only difference is that this version
-@@ -1528,14 +1533,16 @@ static enum ld_plugin_status
- get_symbols_v2(const void* handle, int nsyms, ld_plugin_symbol* syms)
- {
-   gold_assert(parameters->options().has_plugins());
--  Object* obj = parameters->options().plugins()->object(
-+  Plugin_manager* plugins = parameters->options().plugins();
-+  Object* obj = plugins->object(
-     static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
-   if (obj == NULL)
-     return LDPS_ERR;
-   Pluginobj* plugin_obj = obj->pluginobj();
-   if (plugin_obj == NULL)
-     return LDPS_ERR;
--  return plugin_obj->get_symbol_resolution_info(nsyms, syms, 2);
-+  Symbol_table* symtab = plugins->symtab();
-+  return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 2);
- }
- 
- // Add a new (real) input file generated by a plugin.
-diff --git a/gold/plugin.h b/gold/plugin.h
-index ef78b84..f926879 100644
---- a/gold/plugin.h
-+++ b/gold/plugin.h
-@@ -282,6 +282,10 @@ class Plugin_manager
-   input_objects() const
-   { return this->input_objects_; }
- 
-+  Symbol_table*
-+  symtab()
-+  { return this->symtab_; }
-+
-   Layout*
-   layout()
-   { return this->layout_; }
-@@ -396,7 +400,8 @@ class Pluginobj : public Object
- 
-   // Fill in the symbol resolution status for the given plugin symbols.
-   ld_plugin_status
--  get_symbol_resolution_info(int nsyms,
-+  get_symbol_resolution_info(Symbol_table* symtab,
-+                            int nsyms,
-                             ld_plugin_symbol* syms,
-                             int version) const;
-