add piwik installation

www/analytics/core/Updates/1.2.5-rc7.php

@@ -0,0 +1,34 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+
+namespace Piwik\Updates;
+
+use Piwik\Common;
+use Piwik\Updater;
+use Piwik\Updates;
+
+/**
+ */
+class Updates_1_2_5_rc7 extends Updates
+{
+    static function getSql()
+    {
+        return array(
+            'ALTER TABLE `' . Common::prefixTable('log_visit') . '`
+		    	ADD INDEX index_idsite_idvisitor (idsite, idvisitor)' => false,
+        );
+    }
+
+    static function update()
+    {
+        Updater::updateDatabase(__FILE__, self::getSql());
+    }
+}
+
+