chapter06: Translate r11421

Paul Rogers reported that there are many test failures on VIA nano.
Upstream restored a comment about those failures but we didn't translate
it (since it was commented out).  Translate it now.

chapter06/glibc.xml

@@ -219,9 +219,8 @@ unset GCC_INCDIR</userinput></screen>
       </listitem>
 -->
       <listitem>
-        <para>The math tests sometimes fail when running on
-        systems where the CPU is not a relatively new Intel or
-        AMD processor.</para>
+        <para>如果 CPU 不是较新的 Intel 或 AMD 处理器，
+        数学测试有时会失败。</para>
       </listitem>
 <!--
       <listitem>