chicken-scheme: bump to 5.4.0

chicken-scheme: bump to 5.4.0

A patch is included in order to get the compiler (csc) to work properly
on the target device (comment in the OpenWRT package Makefile). csc,
chicken-install, chicken-status have been verified to work. What the
patch does is to remove -fmacro-prefix-map and -ldl in the strings that
are passed to gcc when the Scheme compiler runs. Without that, the
compiler will not run on the router. A longer description is in the
patch header.

Co-authored-by: George Sapkin <redacted>
Signed-off-by: Jeronimo Pellegrini <redacted>