[libcxx] Add list of currently known buildbots to libc++ homepage

Summary:
Instead of having to update test results for different platforms it would be helpful to just supply links to buildbots that build+test libcxx.
For the FreeBSD bots Pawel Worach gave me the OK to link to them.

Reviewers: mclow.lists, danalbert

Reviewed By: danalbert

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D4947

llvm-svn: 215882

libcxx/www/index.html

@@ -134,6 +134,25 @@ <h2 id="dir-structure">Current Status</h2>
    and <a href="results.Linux.html">Linux</a>.
    </p>
 
+   <!--======================================================================-->
+   <h2 id="dir-structure">Build Bots</h2>
+   <!--======================================================================-->
+   <p>These are the libc++ build bots</p>
+   <ul>
+      <li><a href="http://lab.llvm.org:8013/builders/libcxx_clang-x86_64-darwin11-RA">
+        clang-libcxxabi-x86_64-darwin11
+      </a></li>
+      <li><a href="http://llvm-amd64.freebsd.your.org/b/builders/libcxx-amd64-freebsd">
+        clang-libcxxrt-x86_64-freebsd10
+      </a></li>
+      <li><a href="http://llvm-amd64.freebsd.your.org/b/builders/libcxx-i386-freebsd">
+        clang-libcxxrt-i386-freebsd10
+      </a></li>
+      <li><a href="http://lab.llvm.org:8011/builders/libcxx-libcxxabi-x86_64-linux-debian">
+        clang-libcxxabi-x86_64-linux-debian
+      </a></li>
+    </ul>
+
   <!--=====================================================================-->
   <h2>Get it and get involved!</h2>
   <!--=====================================================================-->