doc: document Go 1.2.1

LGTM=minux.ma
R=golang-codereviews, minux.ma
CC=golang-codereviews
https://golang.org/cl/69970047

doc/devel/release.html

@@ -20,6 +20,12 @@ <h2 id="go1.2">go1.2 (released 2013/12/01)</h2>
 Read the <a href="/doc/go1.2">Go 1.2 Release Notes</a> for more information.
 </p>
 
+<h3 id="go1.2.minor">Minor revisions</h3>
+
+<p>
+go1.2.1 (released 2014/03/02) includes bug fixes to the <code>runtime</code>, <code>net</code>, and <code>database/sql</code> packages.
+See the <a href="https://code.google.com/p/go/source/list?name=release-branch.go1.2&r=7ada9e760ce34e78aee5b476c9621556d0fa5d31">change history</a> for details.
+</p>
 
 <h2 id="go1.1">go1.1 (released 2013/05/13)</h2>
 

doc/install.html

@@ -81,8 +81,8 @@ <h3 id="tarball">Linux, Mac OS X, and FreeBSD tarballs</h3>
 
 <p>
 Choose the archive file appropriate for your installation.
-For instance, if you are installing Go version 1.2 for 64-bit x86 on Linux,
-the archive you want is called <code>go1.2.linux-amd64.tar.gz</code>.
+For instance, if you are installing Go version 1.2.1 for 64-bit x86 on Linux,
+the archive you want is called <code>go1.2.1.linux-amd64.tar.gz</code>.
 </p>
 
 <p>