decl.c (gnat_to_gnu_entity): Do not set DECL_ARTIFICIAL on the reused DECL node coming from a renamed object.

	* gcc-interface/decl.c (gnat_to_gnu_entity): Do not set DECL_ARTIFICIAL
	on the reused DECL node coming from a renamed object.
	Set DECL_IGNORED_P on the DECL node built for renaming entities if they
	don't need debug info.

From-SVN: r166530