Log Message:
Update wip/chicken to chicken-4.10.1 (development release).

Changes:
4.10.1
- Runtime system:
  - The calling convention of CPS procedures has been changed to
    use "argument vectors" instead of C calling convention.
  - The C API of C_values(), C_do_apply() and how to invoke CPS
    functions has changed.  The C_procN() macros have disappeared.
    The manual example in "Accessing external objects" for C_values
    has been updated.  See also the "numbers" egg for examples on
    how to support pre- and post-4.10.1 CHICKENs simultaneously.
  - Apply hack is no longer used; the limitation of 128 arguments
    has been lifted for platforms which had no apply hack.
  - Increased the "binary compatibility version" to 8.