parse.y: New rules to allow attributes in a prefix position.

parse.y: New rules to allow attributes in a prefix position.

        * parse.y: New rules to allow attributes in a prefix position.
        (prefix_attributes): New variable.  Pass it into cplus_decl_attributes.
        (setattr): New rule.
        (reserved_declspecs, declmods): Catch attributes here.
        * decl2.c (cplus_decl_attributes): Add PREFIX_ATTRIBUTES argument.
        * decl.c (duplicate_decls): Pass DECL_MACHINE_ATTRIBUTES to
        descendent typedef.
        (grokdeclarator): Added code to support machine attributes.
        * Makefile.in (stamp-parse): Expect 5 shift/reduce failures.

From-SVN: r9172