dev-manual: Updated clone and checkout examples.

Updated the list of returned branches.  That had gone a bit stale
for the exmaple.  Updated the tag checkout example to include the
yet-to-be created "yocto-2.5.3" tag.

(From yocto-docs rev: 7d8074e7543dac90d2d6f42bdfba16810ee8dab9)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/dev-manual/dev-manual-start.xml

@@ -881,11 +881,11 @@
                     <literallayout class='monospaced'>
      $ git clone git://git.yoctoproject.org/poky
      Cloning into 'poky'...
-     remote: Counting objects: 428741, done.
+     remote: Counting objects: 431956, done.
-     remote: Compressing objects: 100% (101285/101285), done.
+     remote: Compressing objects: 100% (101918/101918), done.
-     remote: Total 428741 (delta 320552), reused 428579 (delta 320390)
+     remote: Total 431956 (delta 322982), reused 431910 (delta 322936)
-     Receiving objects: 100% (428741/428741), 153.04 MiB | 27.16 MiB/s, done.
+     Receiving objects: 100% (431956/431956), 153.76 MiB | 6.86 MiB/s, done.
-     Resolving deltas: 100% (320552/320552), done.
+     Resolving deltas: 100% (322982/322982), done.
      Checking connectivity... done.
                     </literallayout>
                     Unless you specify a specific development branch or
@@ -963,13 +963,12 @@
            .
            .
            .
-       remotes/origin/master-next
-       remotes/origin/master-next2
-       remotes/origin/morty
-       remotes/origin/pinky
-       remotes/origin/purple
-       remotes/origin/pyro
        remotes/origin/rocko
+       remotes/origin/rocko-next
+       remotes/origin/sumo
+       remotes/origin/sumo-next
+       remotes/origin/thud
+       remotes/origin/thud-next
                     </literallayout>
                     </para></listitem>
                 <listitem><para>
@@ -1048,11 +1047,10 @@
         .
         .
         .
-     yocto-2.4.4
-     yocto-2.5
-     yocto-2.5.1
      yocto-2.5.2
+     yocto-2.5.3
      yocto-2.6
+     yocto-2.6.1
      yocto_1.5_M5.rc8
                     </literallayout>
                     </para></listitem>