documentation/yocto-project-qs/yocto-project-qs.xml: added libtool to packages

Turns out that the package libtool is necessary for working with ADT during
the installation process.  I need to mention this in the ADT manual but
it would be helpful if it was one of the packages in the QS along with
all the others.  I added libtool to the package requirements lists
for the three supported hosts.

(From yocto-docs rev: 5f95fa1af0cfe9a97e437b8239e139479a1d5317)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/yocto-project-qs/yocto-project-qs.xml

@@ -192,7 +192,7 @@
      unzip texi2html texinfo libsdl1.2-dev docbook-utils gawk \
      python-pysqlite2 diffstat help2man make gcc build-essential \
      g++ desktop-file-utils chrpath libgl1-mesa-dev libglu1-mesa-dev \
-     mercurial autoconf automake groff
+     mercurial autoconf automake groff libtool
             </literallayout>
 
         <para>
@@ -209,11 +209,11 @@
      groff linuxdoc-tools patch linuxdoc-tools cmake help2man \
      perl-ExtUtils-MakeMaker tcl-devel gettext chrpath ncurses apr \
      SDL-devel mesa-libGL-devel mesa-libGLU-devel gnome-doc-utils \
-     autoconf automake
+     autoconf automake libtool
             </literallayout>
 
             <literallayout class='monospaced'>
-     $ sudo zypper install python gcc gcc-c++
+     $ sudo zypper install python gcc gcc-c++ libtool
      $ subversion git chrpath automake
      $ help2man diffstat texinfo mercurial wget
             </literallayout>