Java tests: add queries.xml

Henning Makholm · Henning Makholm · commit baacc6f66b77 · 2019-12-07T02:38:02.000+01:00
The `queries.xml` file defines which extractor the `codeql test` runner will use
to extract databases for the tests. In the future one will be able to write this
information in `qlpack.yml`, but we can't do that immediately because the
_existing_ CodeQL tooling would  refuse to parse  a `qlpack.yml` that has
the new field in it.
diff --git a/java/ql/test/queries.xml b/java/ql/test/queries.xml
@@ -0,0 +1 @@
+<queries language="java"/>
