* gold/incremental.cc (Sized_relobj_incr::Sized_relobj_incr):

	* gold/incremental.cc (Sized_relobj_incr::Sized_relobj_incr):
	Initialize defined_count_.
	(Sized_relobj_incr::do_add_symbols): Count defined symbols.
	(Sized_relobj_incr::do_get_global_symbol_counts): Rewrite.
	(Sized_incr_dynobj::Sized_incr_dynobj): Initialize defined_count_.
	(Sized_incr_dynobj::do_add_symbols): Count defined symbols.
	(Sized_incr_dynobj::do_get_global_symbol_counts): Rewrite.
	* gold/incremental.h (Sized_relobj_incr::defined_count_): New data
	member.
	(Sized_incr_dynobj::defined_count_): New data member.
	* gold/plugin.cc (Sized_pluginobj::do_get_global_symbol_counts):
	Return zeroes instead of internal error.