Move debian rules to the right place before creating the package.

debhelper has changed the way it performs path validations and
building the deb package fails when it tries to compress the files.

Signed-off-by: David Calavera <david.calavera@gmail.com>

hack/make/build-deb

@@ -65,7 +65,7 @@ set -e
 			echo 'ENV DOCKER_EXPERIMENTAL 1' >> "$DEST/$version/Dockerfile.build"
 		fi
 		cat >> "$DEST/$version/Dockerfile.build" <<-EOF
-			RUN ln -sfv hack/make/.build-deb debian
+			RUN mv -v hack/make/.build-deb debian
 			RUN { echo '$debSource (${debVersion}-0~${suite}) $suite; urgency=low'; echo; echo '  * Version: $VERSION'; echo; echo " -- $debMaintainer  $debDate"; } > debian/changelog && cat >&2 debian/changelog
 			RUN dpkg-buildpackage -uc -us
 		EOF