renamed contenst to descriptions

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@2261 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

appendixa/glibc-desc.xml

@@ -1,4 +1,4 @@
-<sect2><title>Contents of Glibc</title>
+<sect2><title>Descriptions</title>
 
 <para>Last checked against version &glibc-contversion;.</para>