gxx.gperf (RETURN): Rename to RETURN_KEYWORD to avoid clashes with the RTL code RETURN.

gxx.gperf (RETURN): Rename to RETURN_KEYWORD to avoid clashes with the RTL code RETURN.

	* gxx.gperf (RETURN): Rename to RETURN_KEYWORD to avoid clashes
	with the RTL code RETURN.
	* hash.h: Regenerated.
	* lex.c (reinit_parse_for_block): Use RETURN_KEYWORD.
	* parse.y: Replace RETURN with RETURN_KEYWORD throughout.
	* parse.c: Regenerated.
	* pt.c: Include varray.h.  Include rtl.h since varray.h requires
	it.
	(inline_parm_levels): New variable.
	(inline_parm_levels_used): Likewise.
	(maybe_begin_member_template_processing): Update them.
	(maybe_end_member_template_processing): Use them, rather than
	guessing how many levels to pop.

From-SVN: r26587