Log Message:
Update ruby-gnome2 packages to 3.1.8.

Upstream changes:
(from https://github.com/ruby-gnome2/ruby-gnome2/blob/3.1.8/NEWS)

== Ruby-GNOME2 3.1.8: 2017-07-15

This is a bug fix release for macOS install.

=== Changes

==== Ruby/GLib2

  * Improvements
    * Supported (({--enable-debug})) for C++ sources.

  * Fixes
    * Fixed auto libffi detection for Homebrew.
      [GitHub#1058][Reported by Andy Meneely]

==== Ruby/Pango

  * Improvements
    * (({Pango::Rectangle#to_a])): Added.

==== Ruby/GObjectIntrospection

  * Improvements
    * Supported non-pointer struct field reader.
      [GitHub#1042][Reported by cedlemo]
    * Supported (({GHashTable<UTF-8, UTF-8>})).

==== Ruby/CairoGObject

  * Improvements
    * CentOS 7: Supported auto native package install.

==== Ruby/GDK3

  * Improvements
    * CentOS 7: Supported auto native package install.

==== Ruby/GTK3

  * Improvements
    * Made more demos workable.

==== Ruby/WebKit2GTK

  * Improvements
    * Added a sample that uses proxy.

==== Ruby/GtkSourceView3

  * Improvements
    * CentOS 7: Supported auto native package install.

=== Thanks

  * cedlemo

  * Andy Meneely

== Ruby-GNOME2 3.1.7: 2017-07-10

=== Changes

==== All

  * Improvements
    * Windows: Supported running commands in bundled packages.

==== Ruby/GLib

  * Improvements
    * (({GLib::Bytes#size})): Added.
    * (({GLib::Bytes#length})): Added.
    * (({GLib::Bytes#pointer})): Added.
    * Made stable glib-mkenums output.
      [GitHub#1054][Patch by dai]
    * Supported GError in callback argument.
    * Windows: Upgraded bundled GLib to 2.52.3.
    * Windows: Upgraded bundled Libtasn1 to 4.12.

==== Ruby/GObjectIntrospection

  * Improvements
    * Supported freeing GSList.
    * Supported not GObject Introspection based bindings object for
      receiver.
    * Supported int16 array output.
    * Supported uint16 array output.
    * Supported uint32 array output.
    * Supported uint64 array output.
    * Supported float array output.
    * Supported double array output.
    * Supported auto (({#inspect})) defining.
    * Homebrew: Supported Homebrew not installed at /usr/local.

==== Ruby/Pango

  * Improvements
    * Supported attribute again.
      [GItHub#1033][Reported by Mamoru TASAKA]
    * Supported (({Pango::Scale})) again.
      [GItHub#1048][Reported by cedlemo]
    * Added missing backward compatibility constants.
    * Windows: Upgraded bundled Pango to 1.40.6.

==== Ruby/GDK3

  * Improvements
    * Windows: Upgraded bundled GTK+ to 3.22.16.

==== Ruby/GTK3

  * Improvements
    * Updated demo.
      [GitHub#1038][GitHub#1039][GitHub#1040][GitHub#1044][GitHub#1045]
      [GitHub#1046][GitHub#1047][GitHub#1049][GitHub#1050][GitHub#1051]
      [GitHub#1052]
      [Patch by cedlemo]
    * Supported working on environment that has GTK+ 4.
      [GitHub#1041][Reported by cedlemo]
    * (({Gtk::TextTag#weight=})) accepts (({Pango::Weight})).
    * (({Gtk::TextBuffer#insert_markup})) stops to require length.
    * (({Gtk::TextTag#scale=})) accepts scale name such as (({:x_small})).
    * Supported (({GLib::Bytes})) as text buffer input.
    * (({Gtk::CssProvider#load_from_data})) accepts (({GLib::Bytes})).

  * Fixes
    * Fixed a crash bug in demo.
      [GitHub#1036][Reported by Mamoru TASAKA]

==== Ruby/Rsvg2

  * Improvements
    * Added samples again.

  * Fixes
    * Added missing Ruby/CairoGObject dependency.
      [GitHub#1035][Reported by peret]

==== Ruby/Clutter

  * Improvements
    * Windows: Built GDK backend again.
      [GitHub:#1034][Reported by Alanzote]
    * Windows: Upgraded bundled Clutter to 1.26.2.

==== Ruby/WebKit2GTK

  * Improvements
    * Added a sample that saves screenshot.
    * Supported (({WebKit2Gtk::WebContext.new(ephemeral: true)})).

==== Ruby/GStreamer

  * Improvements
    * Windows: Upgraded bundled libsoup to 2.58.1.
    * Windows: Upgraded bundled GStreamer to 1.12.1.

==== Ruby/GtkSourceView3

  * Improvements
    * Windows: Upgraded bundled GtkSourceView to 3.24.3.

==== Ruby/VTE3

  * Improvements
    * Windows: Upgraded bundled VTE to 0.48.3.

=== Thanks

  * Alanzote
  * peret
  * cedlemo
  * Mamoru TASAKA
  * dai