Sync gcc options and explanations

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10434 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/gcc.xml

@@ -87,15 +87,15 @@ cd ../gcc-build</userinput></screen>
 
     <variablelist>
       <title>The meaning of the new configure option:</title>
-
+<!--
       <varlistentry>
-        <term><parameter>--disable-install-libiberty</parameter></term>
+        <term><parameter>- -disable-install-libiberty</parameter></term>
         <listitem>
           <para>This prevents GCC from installing its own copy of libiberty,
           which is already provided by Binutils-&binutils-version;.</para>
         </listitem>
       </varlistentry>
-
+-->
       <varlistentry>
         <term><parameter>--with-system-zlib</parameter></term>
         <listitem>