docs: add news item and link release notes for mesa 10.5.7

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
diff --git a/docs/index.html b/docs/index.html
index 08f9eb5..a88f930 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -16,6 +16,12 @@
 
 <h1>News</h1>
 
+<h2>June 07, 2015</h2>
+<p>
+<a href="relnotes/10.5.7.html">Mesa 10.5.7</a> is released.
+This is a bug-fix release.
+</p>
+
 <h2>May 23, 2015</h2>
 <p>
 <a href="relnotes/10.5.6.html">Mesa 10.5.6</a> is released.
diff --git a/docs/relnotes.html b/docs/relnotes.html
index 33a6406..26d1968 100644
--- a/docs/relnotes.html
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@@ -21,6 +21,7 @@
 </p>
 
 <ul>
+<li><a href="relnotes/10.5.7.html">10.5.7 release notes</a>
 <li><a href="relnotes/10.5.6.html">10.5.6 release notes</a>
 <li><a href="relnotes/10.5.5.html">10.5.5 release notes</a>
 <li><a href="relnotes/10.5.4.html">10.5.4 release notes</a>