Update the "cgroup-lite" dep in our deb package from "Suggests" to "Recommends" and add "cgroupfs-mount" as another alternative

I tested to verify that if neither package is available (for example, on Debian Wheezy), apt still continues installing properly.

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)

hack/make/ubuntu

@@ -135,7 +135,7 @@ EOF
 			--deb-recommends ca-certificates \
 			--deb-recommends git \
 			--deb-recommends xz-utils \
-			--deb-suggests cgroup-lite \
+			--deb-recommends 'cgroupfs-mount | cgroup-lite' \
 			--description "$PACKAGE_DESCRIPTION" \
 			--maintainer "$PACKAGE_MAINTAINER" \
 			--conflicts docker \