update to 1.8.5
changes:
-new module: `(srfi srfi-88)'
-New `postfix' read option, for SRFI-88 keyword syntax
-Some I/O primitives have been inlined, which improves I/O performance
-New object-based traps infrastructure
-New support for working on Guile code from within Emacs
-bugfixes

pkgsrc note: added a patch which affects builds without thread
support only (fixes crash on termination)

approved by gdt

(drochner)