added note to ignore warning about make not set setgid and kmem

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@1672 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter05/make-inst.xml

@@ -7,5 +7,17 @@
 make LDFLAGS=-static &&
 make install</userinput></screen></para>
 
+<para>During the make install phase you will see this warning:</para>
+
+<blockquote><screen>chgrp: changing group of `/mnt/lfs/usr/bin/make': Operation not permitted
+/mnt/lfs/usr/bin/make needs to be owned by group kmem and setgid;
+otherwise the `-l' option will probably not work. You may need special
+privileges to complete the installation of /mnt/lfs/usr/bin/make.</screen></blockquote>
+
+<para>You can safely ignore this warning. make doesn't need to be owned by
+group kmem and setgid for the <emphasis>-l</emphasis> option to work (which
+you can use to tell make not to start any new jobs when a certain load on
+the system is reached).</para>
+
 </sect2>