Bug 1500850 - [Wayland] Add missing dbus header dbus-glib-lowlevel.h, r=jhorak

Differential Revision: https://phabricator.services.mozilla.com/D9365

--HG--
extra : moz-landing-system : lando

widget/xremoteclient/DBusRemoteClient.cpp

@@ -13,6 +13,7 @@
 #include "nsPrintfCString.h"
 
 #include <dlfcn.h>
+#include <dbus/dbus-glib-lowlevel.h>
 
 using mozilla::LogLevel;
 static mozilla::LazyLogModule sRemoteLm("DBusRemoteClient");