pt.c (make_fnparm_pack): Split out from...

        * gcc/cp/pt.c (make_fnparm_pack): Split out from...
        (instantiate_decl): ...here.
        (tsubst_pack_expansion): Handle being called in a late-specified
        return type.
        * libiberty/cp-demangle.c (d_expression): Handle pack expansion.
        (d_find_pack): Handle DEMANGLE_COMPONENT_FUNCTION_PARAM.
        (d_print_subexpr): Don't wrap function parms in ().
        (d_print_comp) [DEMANGLE_COMPONENT_PACK_EXPANSION]: Handle
        not finding a pack.

From-SVN: r145013