* lto-streamer-out.c (DFS::DFS_write_tree_body): Do not stream
	DECL_FCONTEXT
	(hash_tree): Do not hash DECL_FCONTEXT
	* tree-streamer-in.c (lto_input_ts_field_decl_tree_pointers):
	Do not stream DECL_FCONTEXT.
	* tree-streamer-out.c (write_ts_field_decl_tree_pointers): Likewise.
	* tree.c (free_lang_data_in_decl): Free DECL_FCONTEXT.

From-SVN: r262585