WaE: -Wshadow signals2

Change-Id: Ib5e6d1e75322dad23f4bb379b8db6dfa4bf18bb0

external/boost/UnpackedTarball_boost.mk

@@ -103,6 +103,7 @@ boost_patches += boost.auto_link.patch
 boost_patches += boost.std.move.patch
 boost_patches += boost.wunused.patch
 boost_patches += boost.wdeprecated-auto_ptr.patch.0
+boost_patches += boost.signal2.Wshadow.warnings.patch
 
 $(eval $(call gb_UnpackedTarball_UnpackedTarball,boost))
 

external/boost/boost.signal2.Wshadow.warnings.patch

+--- misc/boost_1_44_0/boost/signals2/detail/slot_template.hpp
++++ misc/build/boost_1_44_0/boost/signals2/detail/slot_template.hpp
+@@ -117,10 +117,10 @@
+         track_signal(signal);
+         return *this;
+       }
+-      BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)& track(const slot_base &slot)
++      BOOST_SIGNALS2_SLOT_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)& track(const slot_base &slotitem)
+       {
+         tracked_container_type::const_iterator it;
+-        for(it = slot.tracked_objects().begin(); it != slot.tracked_objects().end(); ++it)
++        for(it = slotitem.tracked_objects().begin(); it != slotitem.tracked_objects().end(); ++it)
+         {
+           _tracked_objects.push_back(*it);
+         }