Reapply fix for EXPORT_C problem in backend.dll, which got lost in the merge - bug 2971
<!-- Bus that listens on a debug pipe and requires SHA1 auth, used to test SHA1 -->
<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
<listen>debug-pipe:name=test-server</listen>
<listen>unix:tmpdir=@TEST_SOCKET_DIR@</listen>
<servicedir>@TEST_SERVICE_DIR@</servicedir>
<auth>DBUS_COOKIE_SHA1</auth>
<policy context="default">
<allow send_interface="*"/>
<allow receive_interface="*"/>
<allow own="*"/>
<allow user="*"/>
</policy>
</busconfig>