while looking into Firefox inlining dumps I noticed that we often do not
inline because we think function calls comdat local while the comdat group
itself has been dissolved.

	* cgraph.c (cgraph_node::verify_node): Check that calls_comdat_local
	is set only for symbol in comdat group.
	* symtab.c (symtab_node::dissolve_same_comdat_group_1): Clear it.

From-SVN: r278944