Add blurb for Crack.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156852 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html
index 113ce93..09446c9 100644
--- a/docs/ReleaseNotes.html
+++ b/docs/ReleaseNotes.html
@@ -273,6 +273,18 @@
    a lot of other language and tools projects.  This section lists some of the
    projects that have already been updated to work with LLVM 3.1.</p>
 
+<h3>Crack</h3>
+
+<div>
+
+<p><a href="http://code.google.com/p/crack-language/">Crack</a> aims to provide
+   the ease of development of a scripting language with the performance of a
+   compiled language. The language derives concepts from C++, Java and Python,
+   incorporating object-oriented programming, operator overloading and strong
+   typing.</p>
+
+</div>
+
 <h3>FAUST</h3>
 
 <div>