sdk-manual, mega-manual: Updated the fig for installed ext. SDK

This figure had changed.  I updated the file and folder hierarchy.

Also fixed some wording.

(From yocto-docs rev: 40e89997f50fdaecee88c8c98e21cc212bf1ed13)

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

documentation/sdk-manual/sdk-appendix-obtain.xml

@@ -417,7 +417,7 @@
     </para>
 
     <para>
-        <imagedata fileref="figures/sdk-installed-extensible-sdk-directory.png" scale="60" align="center" />
+        <imagedata fileref="figures/sdk-installed-extensible-sdk-directory.png" scale="80" align="center" />
     </para>
 
     <para>
@@ -432,8 +432,8 @@
     <para>
         Of note in the directory structure are an environment setup script
         for the SDK, a configuration file for the target, a version file for
-        the target, and a log file for the OpenEmbedded build system
-        preparation script run by the installer.
+        the target, and log files for the OpenEmbedded build system
+        preparation script run by the installer and BitBake.
     </para>
 
     <para>
@@ -441,11 +441,9 @@
         portions of the file or directory name.
         For example,
         <replaceable>install_dir</replaceable> is the directory where the SDK
-        is installed, which is <filename>poky_sdk</filename> by default.
+        is installed, which is <filename>poky_sdk</filename> by default, and
         <replaceable>target</replaceable> represents the target
-        architecture (e.g. <filename>i586</filename>) and
-        <replaceable>host</replaceable> represents the development system's
-        architecture (e.g. <filename>x86_64</filename>).
+        architecture (e.g. <filename>i586</filename>).
     </para>
 </section>