stylesheets: add Simplified Chinese for lfs-l10n

It should not affect English book.

stylesheets/lfs-xsl/lfs-l10n.xml

@@ -99,4 +99,26 @@
 
   </l:l10n>
 
+  <!-- Simplified Chinese -->
+  <l:l10n xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0"
+          language="zh_cn" english-language-name="Simplified Chinese">
+
+    <l:gentext key="description" text="描述"/>
+    <l:gentext key="Bootscripts" text="引导脚本"/>
+    <l:gentext key="Configuration Files" text="配置文件"/>
+    <l:gentext key="Kernel Configuration" text="内核配置"/>
+    <l:gentext key="Libraries" text="库"/>
+    <l:gentext key="Others" text="其他"/>
+    <l:gentext key="Packages" text="软件包"/>
+    <l:gentext key="Programs" text="程序"/>
+    <l:gentext key="Scripts" text="脚本"/>
+
+    <l:context name="title-numbered">
+      <l:template name="part" text="第 %n 部分 %t"/>
+    </l:context>
+
+    <l:gentext key="Copyright" text="版权所有"/>
+
+  </l:l10n>
+
 </l:i18n>