Fix the test suite for Out of tree builds

Fix the test suite for Out of tree builds

Move the test suite to the top level Makefile to allow proper
dependencies between the built files and the check target.

Add a generated 'kyua.conf' file to the build directory to pass the
top_srcdir and top_buildir variable from the build system to the test
suite.

Modify the test scripts to fetch the data files from the top_srcdir and
the generated files from the top_builddir variable.

Signed-off-by: Michael Jeanson <mjeanson@debian.org>