unwind-pe.h (read_uleb128, [...]): Move actual reading code here.

        * unwind-pe.h (read_uleb128, read_sleb128): Move actual reading
        code here.  Take _Unwind_{W,Sw}ord*.
        (read_encoded_value_with_base): Use them.
        * unwind-dw2.c (_Unwind_FrameState): Make cfa_offset and cfa_reg
        words.
        (extract_cie_info): Simplify read_?leb128 handling.
        (execute_stack_op, execute_cfa_program): Likewise.
        * unwind-dw2-fde.c (get_cie_encoding): Likewise.

        * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Simplify
        leb128 handling.

From-SVN: r45315