cherrypicking tools and adt r12 relnotes from hc-mr1 Change-Id: I0ea492417581c062f6433e23345fe3fe398709c0

Change-Id: If1091fd0a7934440e73731825d24ab8c519656ab
diff --git a/docs/html/sdk/tools-notes.jd b/docs/html/sdk/tools-notes.jd
index 64c8f2a..d4ebf8a 100644
--- a/docs/html/sdk/tools-notes.jd
+++ b/docs/html/sdk/tools-notes.jd
@@ -62,9 +62,36 @@
 }
 </style>
 
+
 <div class="toggleable opened">
   <a href="#" onclick="return toggleDiv(this)">
         <img src="{@docRoot}assets/images/triangle-opened.png" class="toggle-img" height="9px" width="9px" />
+SDK Tools, Revision 12</a> <em>(June 2011)</em>
+  <div class="toggleme">
+  <dl>
+<dt>Dependencies:</dt>
+<dd>
+<p>If you are developing in Eclipse with ADT, note that the SDK Tools r12 is designed for use with
+ADT 12.0.0 and later. If you haven't already, we highly recommend updating your <a
+href="{@docRoot}sdk/eclipse-adt.html">ADT Plugin</a> to 12.0.0.</p>
+
+<p>If you are developing outside Eclipse, you must have <a href="http://ant.apache.org/">Apache
+Ant</a> 1.8 or later.</p>
+
+<dt>General notes:</dt>
+<dd>
+  <ul>
+    <li>The AVD manager and emulator can now use system images
+    compiled for ARM v7 and x86 CPUs.</li>
+  </ul>
+</dd>
+</dl>
+</div>
+</div>
+
+<div class="toggleable closed">
+  <a href="#" onclick="return toggleDiv(this)">
+        <img src="{@docRoot}assets/images/triangle-closed.png" class="toggle-img" height="9px" width="9px" />
 SDK Tools, Revision 11</a> <em>(May 2011)</em>
   <div class="toggleme">
   <dl>