[sushi] Add forgotten DBus interface file

[Cosimo Cecchi <cosimoc src gnome org>]

commit 234ec9202423f20949e207f38cfadf50994ff413
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Jun 17 11:46:38 2019 -0700

    Add forgotten DBus interface file

 src/org.gnome.NautilusPreviewer.xml | 11 +++++++++++
 1 file changed, 11 insertions(+)
---
diff --git a/src/org.gnome.NautilusPreviewer.xml b/src/org.gnome.NautilusPreviewer.xml
new file mode 100644
index 0000000..cb5ac10
--- /dev/null
+++ b/src/org.gnome.NautilusPreviewer.xml
@@ -0,0 +1,11 @@
+<node>
+  <interface name="org.gnome.NautilusPreviewer">
+    <method name="ShowFile">
+      <arg type="s" direction="in" name="uri" />
+      <arg type="i" direction="in" name="xid" />
+      <arg type="b" direction="in" name="closeIfAlreadyShown" />
+    </method>
+    <method name="Close">
+    </method>
+  </interface>
+</node>