doc/reference.html: update list of sub-repositories.

R=golang-dev, bradfitz, r
CC=golang-dev
https://golang.org/cl/8766043

doc/reference.html

@@ -51,6 +51,10 @@ Install them with "<code><a href="/cmd/go/#Download_and_install_packages_and_dep
 <li><a href="http://code.google.com/p/go/source/browse?repo=crypto"><code>code.google.com/p/go.crypto</code></a> [<a href="http://godoc.org/code.google.com/p/go.crypto">docs</a>]
 <li><a href="http://code.google.com/p/go/source/browse?repo=image"><code>code.google.com/p/go.image</code></a> [<a href="http://godoc.org/code.google.com/p/go.image">docs</a>]
 <li><a href="http://code.google.com/p/go/source/browse?repo=net"><code>code.google.com/p/go.net</code></a> [<a href="http://godoc.org/code.google.com/p/go.net">docs</a>]
+<li><a href="http://code.google.com/p/go/source/browse?repo=text"><code>code.google.com/p/go.text</code></a> [<a href="http://godoc.org/code.google.com/p/go.text">docs</a>]
+<li><a href="http://code.google.com/p/go/source/browse?repo=exp"><code>code.google.com/p/go.exp</code></a> [<a href="http://godoc.org/code.google.com/p/go.exp">docs</a>]
+<li><a href="http://code.google.com/p/go/source/browse?repo=talks"><code>code.google.com/p/go.talks</code></a> [<a href="http://godoc.org/code.google.com/p/go.talks">docs</a>]
+<li><a href="http://code.google.com/p/go/source/browse?repo=blog"><code>code.google.com/p/go.blog</code></a> [<a href="http://godoc.org/code.google.com/p/go.blog">docs</a>]
 </ul>
 
 <p>