Log Message:
ruby-gnome2: update to 3.3.7.

Upstream changes (from NEWS):

== Ruby-GNOME2 3.3.7: 2019-08-17

This is the bug fix release of 3.3.6.

=== Changes

==== Ruby/Pango

  * Improvements

    * (({Pango::AttrList#each})): Added.

    * (({Pango::AttrType})): Added support for (({PANGO_ATTR_FONT_DESC})).

==== Ruby/GObjectIntrospection

  * Improvements

    * Added support for (({GHashTable<utf8, enum>})).

    * Added support for GObject Introspection 1.60.0.

==== Ruby/Pango

  * Improvements

    * Added support for Pango 1.44.
      [GitHub#1288][Reported by Toshiaki Asai]

==== Ruby/GTK3

  * Fixes

    * Fixed document markup.
      [GitHub#1280][GitHub#1281][GitHub#1282][Patch by İsmail Arılık]

==== Ruby/WNCK3

  * Added.
    [GitHub#1284][Reported by Christopher L. Ramsey]

==== Ruby/libsecret

  * Added.

=== Thanks

  * İsmail Arılık

  * Christopher L. Ramsey

  * Toshiaki Asai