doc: add mips64/mips64le to supported GOARCHes

Change-Id: If9dc08d6c29bf60b63d75d973033897ad8bf8cc4
Reviewed-on: https://go-review.googlesource.com/16905Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

doc/install-source.html

@@ -71,6 +71,12 @@ architectures.
 <dd>
 	Supports Linux binaries. New in 1.5 and not as well excercised as other ports.
 </dd>
+<dt>
+	<code>mips64, mips64le</code> (64-bit MIPS big- and little-endian)
+</dt>
+<dd>
+	Supports Linux binaries. New in 1.6 and not as well excercised as other ports.
+</dd>
 </dl>
 
 <p>
@@ -112,7 +118,7 @@ location).
 
 <p>
 If you want to install Go 1.5 on a system that is not supported by Go 1.4 (such
-as <code>linux/ppc64</code>) you can either use
+as <code>linux/ppc64</code> and <code>linux/mips64le</code>) you can either use
 <a href="/src/bootstrap.bash">bootstrap.bash</a> on a system that can bootstrap Go
 1.5 normally, or bootstrap with gccgo 5.
 </p>
@@ -405,7 +411,8 @@ Choices for <code>$GOOS</code> are
 Choices for <code>$GOARCH</code> are
 <code>amd64</code> (64-bit x86, the most mature port),
 <code>386</code> (32-bit x86), <code>arm</code> (32-bit ARM), <code>arm64</code> (64-bit ARM),
-<code>ppc64le</code> (PowerPC 64-bit, little-endian), and <code>ppc64</code> (PowerPC 64-bit, big-endian).
+<code>ppc64le</code> (PowerPC 64-bit, little-endian), <code>ppc64</code> (PowerPC 64-bit, big-endian),
+<code>mips64le</code> (MIPS 64-bit, little-endian), and <code>mips64</code> (MIPS 64-bit, big-endian).
 The valid combinations of <code>$GOOS</code> and <code>$GOARCH</code> are:
 <table cellpadding="0">
 <tr>
@@ -454,6 +461,12 @@ The valid combinations of <code>$GOOS</code> and <code>$GOARCH</code> are:
 <td></td><td><code>linux</code></td> <td><code>ppc64le</code></td>
 </tr>
 <tr>
+<td></td><td><code>linux</code></td> <td><code>mips64</code></td>
+</tr>
+<tr>
+<td></td><td><code>linux</code></td> <td><code>mips64le</code></td>
+</tr>
+<tr>
 <td></td><td><code>netbsd</code></td> <td><code>386</code></td>
 </tr>
 <tr>