pa.h (FUNCTION_ARG_PASS_BY_REFERENCE): Handle pass-by-reference for arguments with a mode, but no type.

        * pa.h (FUNCTION_ARG_PASS_BY_REFERENCE): Handle pass-by-reference
        for arguments with a mode, but no type.
        (FUNCTION_ARG_CALLEE_COPIES): Similarly.
        * t-pa (LIB2FUNCS_EXTRA): Add quadlib.asm.
        * pa/long_double.h: New file.
        * configure.in (hpux10, hpux11 configurations): hpux10 and hpux11
        both have 128bit wide long doubles.
        * configure: Rebuilt.

From-SVN: r32101