ref-manual: Added gzipnative class.

(From yocto-docs rev: 431572a20e8175dc513daedb5f28efe8291a6606)

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

documentation/ref-manual/ref-classes.xml

@@ -771,6 +771,16 @@
     </para>
 </section>
 
+<section id='ref-classes-gzipnative'>
+    <title><filename>gzipnative.bbclass</filename></title>
+
+    <para>
+        The <filename>gzip</filename> native (<filename>gzipnative</filename>)
+        class enables the use of native versions of <filename>gzip</filename>
+        and <filename>pigz</filename> rather than the system versions.
+    </para>
+</section>
+
 <section id='ref-classes-mime'>
     <title><filename>mime.bbclass</filename></title>