re PR tree-optimization/42625 (-fipa-sra can generate different destructors in different object files, binary breaks after linking)

	PR tree-optimization/42625
	* cgraph.c (cgraph_make_node_local): Clear DECL_COMDAT*,
	TREE_PUBLIC, DECL_WEAK and DECL_EXTERNAL also for same_body
	aliases.

	* g++.dg/opt/dtor4.C: New test.
	* g++.dg/opt/dtor4.h: New.
	* g++.dg/opt/dtor4-aux.cc: New.

From-SVN: r155694