cpu added flags, virtualization; uuid added hardware

docs/os.html

@@ -259,6 +259,16 @@ si.osInfo().then(data => console.log(data));</code></pre class="example">
                     <td></td>
                     <td>os specific UUID</td>
                   </tr>
+                  <tr>
+                    <td></td>
+                    <td>hardware</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td></td>
+                    <td>hardware specific UUID</td>
+                  </tr>
                   <tr>
                     <td>si.shell(cb)</td>
                     <td>: string</td>