Add migration to WebAssembly information to PNaCl / NaCl docs.

native_client_sdk/doc_generated/devguide/devcycle/building.html

Index: native_client_sdk/doc_generated/devguide/devcycle/building.html
diff --git a/native_client_sdk/doc_generated/devguide/devcycle/building.html b/native_client_sdk/doc_generated/devguide/devcycle/building.html
index 5a6118fdfccff5eee7723102e2eed3c280efa1ff..5c6a5ff8bbb05d0618b44725092b87fff54b4ad2 100644
--- a/native_client_sdk/doc_generated/devguide/devcycle/building.html
+++ b/native_client_sdk/doc_generated/devguide/devcycle/building.html
@@ -1,7 +1,15 @@
 {{+bindTo:partials.standard_nacl_article}}
 
-<section id="building">
-<span id="devcycle-building"></span><h1 id="building"><span id="devcycle-building"></span>Building</h1>
+<b><font color="#cc0000">
+NOTE:
+Deprecation of the technologies described here has been announced
+for platforms other than ChromeOS.<br/>
+Please visit our
+<a href="/native-client/migration">migration guide</a>
+for details.
+</font></b>
+<hr/><section id="building">
+<h1 id="building">Building</h1>
 <div class="contents local" id="table-of-contents" style="display: none">
 <p class="topic-title first">Table Of Contents</p>
 <ul class="small-gap">