[moved from opencv] cudalegacy: fix test failure of SolvePnPRansac

  * use SOLVE_EPNP for the initial guess

original commit: https://github.com/opencv/opencv/commit/c6de84d868302c7a55852d86aab337a787030e07

modules/cudalegacy/src/calib3d.cpp

@@ -181,7 +181,7 @@ namespace
                    image_subset(0, i) = image->at<Point2f>(subset_indices[i]);
                 }
 
-                solvePnP(object_subset, image_subset, *camera_mat, *dist_coef, rot_vec, transl_vec);
+                solvePnP(object_subset, image_subset, *camera_mat, *dist_coef, rot_vec, transl_vec, false, SOLVEPNP_EPNP);
 
                 // Remember translation vector
                 Mat transl_vec_ = transl_vectors.colRange(iter * 3, (iter + 1) * 3);