PR c++/12909
	* method.c (make_alias_for): Handle VAR_DECL, too.
	* decl2.c (vague_linkage_p): Rename from vague_linkage_fn_p.
	* tree.c (no_linkage_check): Adjust.
	* decl.c (maybe_commonize_var): Adjust.
	* mangle.c (mangle_decl): Adjust.
	* cp-tree.h: Adjust.

From-SVN: r157202