Updating package for CPAN module YAML in textproc/p5-YAML from 0.77 to 0.80

Upstream changes:
version: 0.80
date:    Fri Feb 10 12:56:08 PST 2012
changes:
- Patch from https://rt.cpan.org/Ticket/Display.html?id=73702
- Make YAML::Node subclass YAML::Mo::Object as well as Exporter (MSTROUT)

version: 0.79
date:    Wed Feb  8 17:25:55 PST 2012
changes:
- Peter Scott and others noticed Mo::xxx causing problems on newer perls.
  Removed xxx for now.

version: 0.78
date:    Sun Jan  1 23:53:57 PST 2012
changes:
- Apply patch from ANDK++ to deal with B::Deparse changes.

(sno)