[python-rosdistro] Add yaml dependency

[rmattes]

commit e1f79476f68b2dbc79de30c837be9e02d2a9c272
Author: Rich Mattes <richmattes at gmail.com>
Date:   Sat Feb 8 19:29:41 2014 -0500

    Add yaml dependency

 python-rosdistro.spec |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/python-rosdistro.spec b/python-rosdistro.spec
index 8803beb..72202ad 100644
--- a/python-rosdistro.spec
+++ b/python-rosdistro.spec
@@ -12,6 +12,7 @@ URL:            http://www.ros.org/wiki/rosdistro
 Source0:        https://github.com/ros-infrastructure/%{realname}/archive/%{commit}/%{realname}-%{version}-%{shortcommit}.tar.gz
 
 BuildArch:      noarch
+BuildRequires:  PyYAML
 BuildRequires:  python2-devel
 BuildRequires:  python-catkin-sphinx
 BuildRequires:  git