[gtk+] gemfile: needs add source rubygems.org

[Jakub Steiner <jimmac src gnome org>]

commit 11096885aec103ce56dddbf1ea647b016c10a5c4
Author: Nelson Benítez León <nbenitezl+gnome gmail com>
Date:   Sat Mar 14 15:38:40 2015 +0500

    gemfile: needs add source rubygems.org
    
    `bundle install` command on fedora 21 was failing
    with following message:
    
    Your Gemfile has no gem server sources. If you need
    gems that are not already on your machine, add a line
    like this to your Gemfile:
    source 'https://rubygems.org'
    
    After adding that line it worked again.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=746205

 gtk/theme/Adwaita/Gemfile      |    1 +
 gtk/theme/HighContrast/Gemfile |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/theme/Adwaita/Gemfile b/gtk/theme/Adwaita/Gemfile
index 99f8e2a..56af69e 100644
--- a/gtk/theme/Adwaita/Gemfile
+++ b/gtk/theme/Adwaita/Gemfile
@@ -1 +1,2 @@
+source 'https://rubygems.org'
 gem "sass", "~> 3.4.0"
diff --git a/gtk/theme/HighContrast/Gemfile b/gtk/theme/HighContrast/Gemfile
index 99f8e2a..56af69e 100644
--- a/gtk/theme/HighContrast/Gemfile
+++ b/gtk/theme/HighContrast/Gemfile
@@ -1 +1,2 @@
+source 'https://rubygems.org'
 gem "sass", "~> 3.4.0"