ruby-gnome2: update to 3.2.7.

pkgsrc changes:

* remove a fix for glib2 pulled from upstream
* remove a gobject-introspection patch for netbsd-6 (seems fixed in upstream)

Upstream changes (from NEWS):

== Ruby-GNOME2 3.2.7: 2018-06-07

This is a packaging bug fix release of 3.2.6.

=== Changes

==== All

  * Improvements

    * Added support for using unreleased version with Bundler.
      [Patch by cedlemo]

  * Fixes

    * Fixed a packaging bug that dependencies are missing.

== Ruby-GNOME2 3.2.6: 2018-06-06

This is a bug fix release of 3.2.5.

=== Changes

==== Document

  * Improvements

    * Updated project URL.
      [GitHub#1174][Patch by okkez]

==== All

  * Improvements

    * Added support for using unreleased version with Bundler.
      [Patch by cedlemo]

    * Windows: Upgraded bundled library versions.

==== Ruby/GLib2

  * Improvements

    * (({GLib::Object.define_signal})): Added.
      (({GLib::Object.signal_new})) is deprecated.

    * (({GLib::Object.signal_new})): Changed to accept (({Symbol})) as
      flags.

    * (({GLib::Signal})): Migrated to (({TypedData})).

    * (({GLib::Enum})): Migrated to (({TypedData})).

    * (({GLib::Flags})): Migrated to (({TypedData})).

    * (({GLib::Boxed})): Migrated to (({TypedData})).

    * (({GLib::Param})): Migrated to (({TypedData})).

    * (({rbgobj_signal_new()})): Added.
      (({rbgobj_signal_wrap()})) is deprecated.

    * Dropped GLib < 2.28 support.

    * (({GLib::Variant.new})): Changed to accept (({String})) as
      variant type.

    * (({rbg_variant_type_from_ruby()})): Added.

    * (({rbg_gc_guard()})): Added.

    * (({rbg_gc_unguard()})): Added.

  * Fixes

    * Fixed a bug that signal created by (({GLib::Object.signal_new}))
      may be GC-ed.
      [GitHub#1166][Reported by Izumi Tsutsui]

==== Ruby/GObjectIntrospection

  * Improvements

    * (({GObjectIntrospection::Struct})): Migrated to (({TypedData})).

    * Improved better function detection.

    * Added heuristic callback data detection.

    * Added support for getting flags field value.

    * (({RBGICallbackData})): Hidden details.

    * (({rb_gi_callback_data_get_metadata()})): Added.

    * (({rb_gi_callback_data_get_rb_callback()})): Added.

    * Added (({to_integer})) to (({to_i})) mapping.
      [GitHub#1191][Patch by yosuke shiro]

==== Ruby/CairoGObject

  * Improvements

    * Added (({gtype})) class methods.

==== Ruby/GIO2

  * Improvements

    * (({Gio::MenuItem#set_attribute_value})): Improved argument conversion.
      Callers don't need to create (({GLib::Variant})).

    * (({Gio::Settings.new})): Added support for keyword (({Hash})).
      [GitHub#1187][Patch by cedlemo]

==== Ruby/Pango

  * Improvements

    * (({Pango::Attribute})): Migrated to (({GLib::Boxed})).

    * (({Pango::Rectangle#dup})): Added.

    * (({rbpango_attribute_from_ruby()})): Added.

  * Fixes

    * Fixed a bug that wrong (({Pango::Attribute})) conversion.
      [GitHub#1188][Reported by kojix2]

==== Ruby/GdkPixbuf2

  * Improvements

    * (({GdkPixbuf::Pixbuf#subpixbuf})): Added.
      (({GdkPixbuf::Pixbuf#new_subpixbuf})) is deprecated.

    * (({GdkPixbuf::Pixbuf#new})): Improved the default
      (({row_stride})) value.

==== Ruby/GDK3

  * Improvements

    * (({Gdk::Cursor.new})): Added multiple calls with the same value.
      [GitHub#1195][Reported by kojix2]

==== Ruby/GTK3

  * Improvements

    * Removed needless custom callback handlers.

    * Dropped GTK+ 3.10 support.

    * (({Gtk::Application.new})): Changed to all arguments are omittable.

    * (({Gtk::TextBuffer#insert})): Changed to raise an exception for
      unknown tag.

  * Fixes

    * Fixed a bug that (({Gtk::Version.or_later?})) requires the 3rd
      argument.

    * Fixed demo.
      * [GitHub#1175][GitHub#1176][GitHub#1177][GitHub#1178][GitHub#1183]
        [GitHub#1184][GitHub#1185]
        [Reported by kojix2]
      * [GitHub#1181][GitHub#1186][GitHub#1197][GitHub#1210]
        [Patch by kojix2]

==== Ruby/Poppler

  * Improvements

    * (({Cairo::Context#show_poppler_page})): Added for consistency.

==== Ruby/RSVG2

  * Improvements

    * (({Cairo::Context#show_rsvg_handle})): Added for consistency.

==== Ruby/GStreamer

  * Improvements

    * (({Gst::Element.[]})): Added as a shortcut of
      (({Gst::ElementFactory.make})).

    * (({Gst::Bus#poll})): Made all arguments omittable.

=== Thanks

  * Izumi Tsutsui

  * okkez

  * kojix2

  * cedlemo

  * yosuke shiro

(tsutsui)