Fixed an Index entry.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@8034 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/util-linux.xml

@@ -293,7 +293,7 @@ patch -Np1 -i ../&util-linux-lseek-patch;</userinput></screen>
           <para>Acquires a file lock and then executes a command with the lock
           held</para>
           <indexterm zone="ch-system-util-linux flock">
-            <primary sortas="b-fdisk">flock</primary>
+            <primary sortas="b-flock">flock</primary>
           </indexterm>
         </listitem>
       </varlistentry>