Updated: ruby-goocanvas1-1.2.6-6

[Daisuke Fujimura via Cygwin-announce]

The following packages have been uploaded to the Cygwin distribution:

- https://cygwin.com/packages/summary/ruby-goocanvas1-src.html
  - ruby-goocanvas1
  - ruby-goocanvas1-doc
  - ruby-goocanvas1-devel