Add include-what-you-use to the External Projects list.

llvm-svn: 143073
diff --git a/llvm/docs/ReleaseNotes.html b/llvm/docs/ReleaseNotes.html
index 146df7f..acd7dc0 100644
--- a/llvm/docs/ReleaseNotes.html
+++ b/llvm/docs/ReleaseNotes.html
@@ -377,6 +377,18 @@
 </div>
 
 <!--=========================================================================-->
+<h3>include-what-you-use</h3>
+
+<div>
+
+<p><a href="http://code.google.com/p/include-what-you-use">include-what-you-use</a>
+   is a tool to ensure that a file directly <code>#include</code>s
+   all <code>.h</code> files that provide a symbol that the file uses. It also
+   removes superfluous <code>#include</code>s from source files.</p>
+
+</div>
+
+<!--=========================================================================-->
 <h3>LanguageKit and Pragmatic Smalltalk</h3>
 
 <div>