Add dm-verity warning include

This can be included in device markdowns to warn users about
the dangers of allowing system modifications and how to
get around it.

Change-Id: I8eca342031dff22e342b404aa01d8693aaf0fb4f
diff --git a/_includes/dmverity.html b/_includes/dmverity.html
new file mode 100644
index 0000000..37ae9b6
--- /dev/null
+++ b/_includes/dmverity.html
@@ -0,0 +1,3 @@
+<div class='page-heading'>This device uses dm-verity!</div>
+<hr />
+<p class="text">This means that swiping to allow system modifications will prevent you from being able to boot if you are using the stock kernel. In order to bypass dm-verity's boot prevention, you will have to install a kernel that has dm-verity disabled in the fstab.</p>