Add example database for testing purposes.

This example database and it's content can be used for
various testing purposes.

The testsuite of the perl bindings depends on it.
Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

testdata/Readme.txt

+The database in this folder can be used to run various tests against it and
+has been created by using the "create-database.py" script in the examples directory.
+
+It contains the following content:
+
+Vendor: "IPFire Project"
+Description: "This is a geo location database"
+License: "CC"
+
+AS: "AS204867 (Lightning Wire Labs GmbH)"
+Subnet: "2a07:1c44:5800::/40"
+Country Code: "DE"