tests: do not run tests/test-rollsum as part of make check
tests: do not run tests/test-rollsum as part of make check

it is not really a unit test.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

Conflicts:
	Makefile-tests.am

GNOME/ostree,GNOME/ostree,leandrosansilva/ostree,leandrosansilva/ostree,gatispaeglis/ostree,resin-io/ostree,sujitfulse/ostree,resin-io/ostree,gatispaeglis/ostree,sujitfulse/ostree,leandrosansilva/ostree,gatispaeglis/ostree,GNOME/ostree,sujitfulse/ostree,leandrosansilva/ostree,GNOME/ostree,resin-io/ostree,gatispaeglis/ostree,gatispaeglis/ostree,leandrosansilva/ostree,resin-io/ostree,GNOME/ostree,resin-io/ostree,sujitfulse/ostree,gatispaeglis/ostree,sujitfulse/ostree