unity-scope-manpages ftbfs in utopic

Bug Description

the package is missing a bug subscriber.

unity-scope-manpages ftbfs in utopic, seen in the test rebuild at
https://launchpad.net/ubuntu/+archive/test-rebuild-20140914/+build/6376939

 debian/rules build
dh build --with python3
   dh_testdir
   dh_auto_configure
   debian/rules override_dh_auto_build
make[1]: Entering directory '/build/buildd/unity-scope-manpages-3.0+14.04.20140324'
python3 setup.py build
running build
running build_i18n
intltool-update -p -g unity-scope-manpages
intltool-merge -d po data/manpages.scope.in build/share/unity/scopes/code/manpages.scope
Merging translations into build/share/unity/scopes/code/manpages.scope.
make[1]: Leaving directory '/build/buildd/unity-scope-manpages-3.0+14.04.20140324'
   debian/rules override_dh_auto_test
make[1]: Entering directory '/build/buildd/unity-scope-manpages-3.0+14.04.20140324'
nosetests3

(nosetests3:22047): Gdk-ERROR **: error: XDG_RUNTIME_DIR not set in the environment.

debian/rules:15: recipe for target 'override_dh_auto_test' failed
make[1]: *** [override_dh_auto_test] Trace/breakpoint trap (core dumped)
make[1]: Leaving directory '/build/buildd/unity-scope-manpages-3.0+14.04.20140324'
debian/rules:6: recipe for target 'build' failed
make: *** [build] Error 2