Add autogen.sh to EXTRA_DIST
Add autogen.sh to EXTRA_DIST

For compatibility with deb-build-snapshot, which runs git clean -fdx on the
source tree, dh_autoreconf is configured to run autogen.sh so that the intltool
files are re-created. However, autogen.sh is not included in dist tarballs,
making builds fail on OBS. Ship it to square this circle.

endlessm/eos-theme