ref-manual: Updated the intro to the devtool quick reference.

(From yocto-docs rev: cb2c4adc48e723072550de0c1ff1f61201c9e8a6)

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

documentation/ref-manual/ref-devtool-reference.xml

@@ -6,18 +6,19 @@
     <title><filename>devtool</filename> Quick Reference</title>
 
     <para>
-        The <filename>devtool</filename> command is pivotal when using an
-        <ulink url='&YOCTO_DOCS_SDK_URL;#sdk-extensible'>extensible SDK</ulink>.
-        This command-line tool provides a number of features that help you
-        build, test and package software within the extensible SDK, and
-        optionally integrate it into an image built by the OpenEmbedded build
-        system.
+        The <filename>devtool</filename> command-line tool provides a number
+        of features that help you build, test, and package software.
+        This command is available alongside the <filename>bitbake</filename>
+        command.
+        Additionally, the <filename>devtool</filename> command is a key
+        part of the extensible SDK.
     </para>
 
     <para>
         This chapter provides a Quick Reference for the
         <filename>devtool</filename> command.
-        For more information on how to apply the command, see the
+        For more information on how to apply the command when using the
+        extensible SDK, see the
         "<ulink url='&YOCTO_DOCS_SDK_URL;#sdk-extensible'>Using the Extensible SDK</ulink>"
         section in the Yocto Project Software Development Kit (SDK) Developer's
         Guide.