overview-manual: Added new "overview" manual to YP doc set

Fixes [YOCTO #12370]

I added all the mechanics for this new "Yocto Project Overview Manual".
For now, the manual builds and publishes into the 2.5 area.  I used
"overview-manual" for the folder name.  Makefile properly builds the
new manual.  The mega-manual.sed file processes links for the new manual.
The mega-manual.xml file includes the new manual.  The poky.ent file
includes a new ENTITY link for the overview manual.  All pieces are in
place.

With this commit, just an overview chapter exists.  The remaining content
needs to be developed.

(From yocto-docs rev: 632ebd4a91920585e736527e070ca8363a00f41b)

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

1 files changed, 9 insertions, 0 deletions

diff --git a/documentation/mega-manual/mega-manual.xml b/documentation/mega-manual/mega-manual.xml
index 3557cae84b..22b3a86a4d 100644
--- a/documentation/mega-manual/mega-manual.xml
+++ b/documentation/mega-manual/mega-manual.xml
@@ -129,6 +129,15 @@
     <xi:include
         xmlns:xi="http://www.w3.org/2003/XInclude" href="../yocto-project-qs/qs.xml"/>
 
+<!-- Includes overview-manual title image and then overview-manual chapters -->
+
+    <para>
+        <imagedata fileref="figures/overview-title.png" width="100%" align="left" scalefit="1" />
+    </para>
+
+    <xi:include
+        xmlns:xi="http://www.w3.org/2003/XInclude" href="../overview-manual/overview-manual-intro.xml"/>
+
 <!-- Includes dev-manual title image and then dev-manual chapters -->
 
     <para>