[mingw-webkitgtk3] Add missing BR

[Kalev Lember]

commit e7d35a1f18d2eaacd7ca92d68cd2de1a1d205b08
Author: Kalev Lember <kalevlember at gmail.com>
Date:   Sat Oct 20 14:11:36 2012 +0200

    Add missing BR

 mingw-webkitgtk3.spec |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/mingw-webkitgtk3.spec b/mingw-webkitgtk3.spec
index 66210ec..2f6ef52 100644
--- a/mingw-webkitgtk3.spec
+++ b/mingw-webkitgtk3.spec
@@ -34,6 +34,7 @@ BuildRequires:  bison
 BuildRequires:  flex
 BuildRequires:  gettext
 BuildRequires:  gperf
+BuildRequires:  ruby
 
 # For autoreconf
 BuildRequires:  autoconf automake libtool