NaCl SDK doc: Recover sandbox internal doc for x86-64

native_client_sdk/doc_generated/reference/sandbox_internals/index.html

Index: native_client_sdk/doc_generated/reference/sandbox_internals/index.html
diff --git a/native_client_sdk/doc_generated/reference/sandbox_internals/index.html b/native_client_sdk/doc_generated/reference/sandbox_internals/index.html
index 053f79f2f9f3872b2621f0686357dee62ebccd54..672a44cabf3a1cc3cd36bfcdd893e68b076a03c5 100644
--- a/native_client_sdk/doc_generated/reference/sandbox_internals/index.html
+++ b/native_client_sdk/doc_generated/reference/sandbox_internals/index.html
@@ -21,9 +21,7 @@ untrusted: it too runs in a Native Client sandbox described below.</p>
 <li>x86-32: the original design is described in <a class="reference external" href="http://research.google.com/pubs/archive/34913.pdf">Native Client: A Sandbox
 for Portable, Untrusted x86 Native Code</a>, the current
 design has changed slightly since then.</li>
-<li>x86-64: the original design is described in <a class="reference external" href="http://research.google.com/pubs/archive/35649.pdf">Adapting Software Fault
-Isolation to Contemporary CPU Architectures</a>, the current
-design has changed slightly since then.</li>
+<li><a class="reference internal" href="/native-client/reference/sandbox_internals/x86-64-sandbox.html#x86-64-sandbox"><em>x86-64</em></a>.</li>
 <li>MIPS32, described in the <a class="reference external" href="https://code.google.com/p/nativeclient/issues/attachmentText?id=2275&amp;aid=22750018000&amp;name=native-client-mips-0.4.txt">overview of Native Client for MIPS</a>,
 and <a class="reference external" href="https://code.google.com/p/nativeclient/issues/detail?id=2275">bug 2275</a>.</li>
 </ul>