non-x86-efi: Reapply "glibc: fix tanh crash on old processors"

This reverts commit 196ab73c44.

The patch slot is repurposed with parallel build fix (target
independent) so add it back before merging trunk.

chapter03/patches.xml

@@ -77,15 +77,14 @@
     </varlistentry>
 -->
 
-<!--
     <varlistentry>
-      <term>Glibc Upstream Fixes Patch - <token>&glibc-upstream-patch-size;</token>:</term>
+      <term>Glibc Upstream Fix Patch - <token>&glibc-upstream-patch-size;</token>:</term>
       <listitem>
         <para>Download: <ulink url="&patches-root;&glibc-upstream-patch;"/></para>
         <para>MD5 sum: <literal>&glibc-upstream-patch-md5;</literal></para>
       </listitem>
     </varlistentry>
--->
+
     <varlistentry>
       <term>Glibc FHS Patch - <token>&glibc-fhs-patch-size;</token>:</term>
       <listitem>

chapter08/glibc.xml

@@ -50,13 +50,12 @@
 
 <screen><userinput remap="pre">patch -Np1 -i ../&glibc-fhs-patch;</userinput></screen>
 
-<!--
-    <para>Now add some fixes to address building and testing with Linux 7,
-    and fix 5 security vulnerabilities found after the glibc-2.43
-    release:</para>
+    <para>Now fix an issue causing the
+    <ulink role='man' url='&man;tanh.3'>tanh(3)</ulink> function to crash
+    on some old x86_64 processors.  Newer x86_64 processors and 32-bit x86
+    processors are not affected but the patch makes no harm either:</para>
 
 <screen><userinput remap="pre">patch -Np1 -i ../&glibc-upstream-patch;</userinput></screen>
--->
 
     <para>The Glibc documentation recommends building Glibc
     in a dedicated build directory:</para>

patches.ent

@@ -27,11 +27,9 @@
 <!ENTITY glibc-fhs-patch-md5 "9a5997c3452909b1769918c759eff8a2">
 <!ENTITY glibc-fhs-patch-size "2.8 KB">
 
-<!--
-<!ENTITY glibc-upstream-patch "glibc-&glibc-version;-upstream_fixes-1.patch">
-<!ENTITY glibc-upstream-patch-md5 "1f5074a1dce85a72d2ea465ca76e420b">
-<!ENTITY glibc-upstream-patch-size "49 KB">
--->
+<!ENTITY glibc-upstream-patch "glibc-&glibc-version;-upstream_fix-1.patch">
+<!ENTITY glibc-upstream-patch-md5 "1a9afeffc6bcf8dde6beb29aebb4a847">
+<!ENTITY glibc-upstream-patch-size "3.3 KB">
 
 <!ENTITY kbd-backspace-patch "kbd-&kbd-version;-backspace-1.patch">
 <!ENTITY kbd-backspace-patch-md5 "f75cca16a38da6caa7d52151f7136895">