add bazel java POC; works with algorithms and graph

ortools/graph/samples/SimpleMaxFlowProgram.java

@@ -21,6 +21,7 @@ import com.google.ortools.graph.MaxFlow;
 /** Minimal MaxFlow program. */
 public final class SimpleMaxFlowProgram {
   public static void main(String[] args) throws Exception {
+    System.loadLibrary("jniortools");
     Loader.loadNativeLibraries();
     // [START solver]
     // Instantiate a SimpleMaxFlow solver.