[gnome-shell] build: Fix build with gtk-doc=true

[Florian Müllner <fmuellner src gnome org>]

commit 4a4fa8b2d7a2ca799d9b7bb58601742b2b38535b
Author: Pascal Nowack <Pascal Nowack gmx de>
Date:   Mon Sep 17 14:19:13 2018 +0200

    build: Fix build with gtk-doc=true
    
    Commit a76b28bd moved the dbus-interfaces to the
    dbus-interfaces directory without changing the
    path for docs build as well, resulting in a fail
    of the build when building with gtk_doc=true.
    
    So change the path in the build accordingly to
    ensure that the build does not fail when building
    with gtk_doc=true.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/236

 docs/reference/shell/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/docs/reference/shell/meson.build b/docs/reference/shell/meson.build
index a32d6a58a..a963db792 100644
--- a/docs/reference/shell/meson.build
+++ b/docs/reference/shell/meson.build
@@ -24,7 +24,7 @@ ifaces = [
 ]
 foreach iface : ifaces
   custom_target(iface[0] + ' docs',
-    input: '../../../data/@0@.xml'.format(iface[0]),
+    input: '../../../data/dbus-interfaces/@0@.xml'.format(iface[0]),
     output: 'doc-gen-' + iface[1],
     command: [
       'gdbus-codegen',