re PR lto/60567 (lto1 ICE in add_symbol_to_partition, at lto/lto-partition.c:233 with -fno-use-linker-plugin)

	PR lto/60567
	* ipa.c (function_and_variable_visibility): Copy forced_by_abi flag from
	decl_node to node.

	* g++.dg/lto/pr60567_0.C: New test.

From-SVN: r209280