[gnome-continuous-yocto/gnomeostree-3.28-rocko: 1654/8267] ref-manual: Updated the do_packages task.

[Emmanuele Bassi <ebassi src gnome org>]

commit bb1643444eb35d060562ccb8e6f3cb415e5ba046
Author: Scott Rifenbark <srifenbark gmail com>
Date:   Mon Jul 18 12:25:39 2016 -0700

    ref-manual: Updated the do_packages task.
    
    Fixes [YOCTO #9967]
    
    Added more detail to this task description.
    
    (From yocto-docs rev: 8cb154493a6b4ee541826f898b823a4dc2795f88)
    
    Signed-off-by: Scott Rifenbark <srifenbark gmail com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 documentation/ref-manual/ref-tasks.xml |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/documentation/ref-manual/ref-tasks.xml b/documentation/ref-manual/ref-tasks.xml
index a9559bb..e2fd673 100644
--- a/documentation/ref-manual/ref-tasks.xml
+++ b/documentation/ref-manual/ref-tasks.xml
@@ -299,8 +299,15 @@
         <title><filename>do_package</filename></title>
 
         <para>
-            Analyzes the content of the holding area and splits it into subsets
-            based on available packages and files.
+            Analyzes the content of the holding area
+            <filename>${</filename><link linkend='var-D'><filename>D</filename></link><filename>}</filename>
+            and splits the content into subsets based on available packages
+            and files.
+            This task makes use of the
+            <link linkend='var-PACKAGES'><filename>PACKAGES</filename></link>
+            and
+            <link linkend='var-FILES'><filename>FILES</filename></link>
+            variables.
         </para>
     </section>