[ITA] ruby-cairo-gobject 4.1.7

[Daisuke Fujimura via Cygwin-apps]

Hello,

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Cygportfile:
- https://cygwin.com/cgit/cygwin-packages/playground/tree/?h=ruby-cairo-gobject

Packages, logs:
- https://github.com/cygwin/scallywag/actions/runs/5330596103

Changes:
- Remove PKG_IGNORE
  - implib is not generated without the linker option `-out-implib`

ruby-cairo-gobject.cygport.diff
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