poky.ent, ref-manual: Updated list of Fedora packages

I added perl-Thread-Queue to the essential and graphical
package sets for the Fedora distribution.

Reported-by: Richard Purdie <richard.purdie@intel.com>
(From yocto-docs rev: 3143176a2ff2444ba753cea64e0de6796cfb06ae)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/introduction.xml

@@ -226,7 +226,7 @@
                     <listitem><para><emphasis>Graphical Extras:</emphasis>
                         Packages recommended if the host system has graphics support:
                         <literallayout class='monospaced'>
-     $ sudo yum install SDL-devel xterm
+     $ sudo yum install SDL-devel xterm perl-Thread-Queue
                         </literallayout></para></listitem>
                     <listitem><para><emphasis>Documentation:</emphasis>
                         Packages needed if you are going to build out the