Fix the source distribution manifest to include all test data

We actually need all this for the test suite, so let's just pull
it all in.

MANIFEST.in

@@ -3,9 +3,4 @@ include COPYING
 include README.md
 recursive-include configs *.toml
 recursive-include rpmlint *.toml
-recursive-include test/binary *
-recursive-include test/configs *
-recursive-include test/pyc *
-recursive-include test/source *
-recursive-include test/spec *
-include test/Dockerfile*
+recursive-include test *