autoconf: restore TESTSUITEFLAGS

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@12159 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter08/autoconf.xml

@@ -65,13 +65,13 @@
     several tests are skipped that use Automake. For full test coverage,
     Autoconf can be re-tested after Automake has been installed.  In addition,
     two tests fail due to changes in libtool-2.4.3 and later.</para>
-
+-->
     <note><para>The test time for autoconf can be reduced significantly on a
     system with multiple cores.  To do this, append
     <command>TESTSUITEFLAGS=-j&lt;N&gt;</command> to the line above.  For
     instance, using -j4 can reduce the test time by over 60
     percent.</para></note>
--->
+
     <para>Install the package:</para>
 
 <screen><userinput remap="install">make install</userinput></screen>