ref-manual: Added "Target Package Management with RMP" section.

New section for the Migration chapter.

Reported-by: Paul Eggleton <paul.eggleton@linux.com>
(From yocto-docs rev: 34745eec0f30d1ee5e02c1e681d7506a85d78aa9)

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

documentation/ref-manual/migration.xml

@@ -363,6 +363,21 @@
         </para>
     </section>
 
+    <section id='migration-target-package-management-with-rpm'>
+        <title>Target Package Management with RPM</title>
+
+        <para>
+            If runtime package management is enabled and the RPM backend 
+            is selected, Smart is now installed for package download, dependency 
+            resolution, and upgrades instead of Zypper.
+            For more information on how to use Smart, run the following command 
+            on the target:
+            <literallayout class='monospaced'>
+     smart --help
+            </literallayout>
+        </para>
+    </section>
+
     <section id='migration-1.4-recipes-moved'>
         <title>Recipes Moved</title>