manuals: correct and improve descriptions of Autotools

(From yocto-docs rev: c7cb693673566ec12b95c568945b514ed0e18522)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/overview-manual/concepts.rst

@@ -109,10 +109,10 @@ Classes
 Class files (``.bbclass``) contain information that is useful to share
 between recipes files. An example is the
 :ref:`autotools <ref-classes-autotools>` class,
-which contains common settings for any application that Autotools uses.
-The ":ref:`ref-manual/classes:Classes`" chapter in the
-Yocto Project Reference Manual provides details about classes and how to
-use them.
+which contains common settings for any application that is built with
+the `GNU Autotools <https://en.wikipedia.org/wiki/GNU_Autotools>`__.
+The ":ref:`ref-manual/classes:Classes`" chapter in the Yocto Project
+Reference Manual provides details about classes and how to use them.
 
 Configurations
 --------------

documentation/ref-manual/classes.rst

@@ -78,7 +78,8 @@ about the variable flags (varflags) that help control archive creation.
 ``autotools*.bbclass``
 ======================
 
-The ``autotools*`` classes support Autotooled packages.
+The ``autotools*`` classes support packages built with the
+`GNU Autotools <https://en.wikipedia.org/wiki/GNU_Autotools>`__.
 
 The ``autoconf``, ``automake``, and ``libtool`` packages bring
 standardization. This class defines a set of tasks (e.g. ``configure``,