Update checker build link, and remove stale links.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155622 91177308-0d34-0410-b5e6-96231b3b80d8

www/analyzer/latest_checker.html.incl

-<b><a href="http://bit.ly/GUmtVB">checker-263.tar.bz2</a></b> (built March 22, 2012)
+<b><a href="http://bit.ly/JATSI8">checker-264.tar.bz2</a></b> (built April 26, 2012)

www/analyzer/release_notes.html

@@ -15,10 +15,18 @@
 
 <h1>Release notes for <tt>checker-XXX</tt> builds</h1>
 
+<h4 id="checker_264">checker-264</h4>
+
+<p><b>built:</b> April 26, 2012</br>
+  <b>download:</b> <a href="http://bit.ly/JATSI8">checker-264.tar.bz2</a></p>
+  <p><b>highlights:</b></p>
+
+<p>This release contains misc. bug fixes and performance enhancements over checker-263, including
+  a reduction of some kinds of false positives related to the malloc() checker.</p>
+
 <h4 id="checker_263">checker-263</h4>
 
 <p><b>built:</b> March 22, 2012</br>
-   <b>download:</b> <a href="http://bit.ly/GUmtVB">checker-263.tar.bz2</a></p>
 <p><b>highlights:</b></p>
 
 <ul>
@@ -28,7 +36,6 @@
 <h4 id="checker_262">checker-262</h4>
 
 <p><b>built: </b>March 15, 2012</br>
-   <b>download:</b> <a href="http://bit.ly/xETQF0">checker-262.tar.bz2</a></p>
 <p><b>highlights:</b></p>
 
 <ul>
@@ -42,7 +49,6 @@
 <h4 id="checker_261">checker-261</h4>
 
 <p><b>built: </b>February 22, 2012<br>
-<b>download:</b> <a href="http://bit.ly/yN1Awv">checker-261.tar.bz2</a></p>
 <p><b>highlights:</b></p>
 
 <ul>
@@ -58,7 +64,6 @@
 <h4 id="checker_260">checker-260</h4>
 
 <p><b>built: </b>January 25, 2012<br>
-<b>download:</b> <a href="http://bit.ly/wpAqVP">checker-260.tar.bz2</a></p>
 <p><b>highlights:</b></p>
 
 <p>This is essentially the same as checker-259, but enables the following <i>experimental</i> checkers (please provide feedback):</p>
@@ -74,7 +79,6 @@
 <h4 id="checker_259">checker-259</h4>
 
 <p><b>built: </b>January 25, 2012<br>
-<b>download:</b> <a href="http://bit.ly/zOWf1P">checker-259.tar.bz2</a></p>
 <p><b>highlights:</b></p>
 
 <ul>