File add-missing-include.patch of Package phd2

diff -ru orig/contributions/MPI_IS_gaussian_process/tests/gaussian_process/gp_guider_test.cpp mod/contributions/MPI_IS_gaussian_process/tests/gaussian_process/gp_guider_test.cpp
--- orig/contributions/MPI_IS_gaussian_process/tests/gaussian_process/gp_guider_test.cpp	2024-07-31 05:59:39.000000000 +0200
+++ mod/contributions/MPI_IS_gaussian_process/tests/gaussian_process/gp_guider_test.cpp	2024-09-13 14:47:03.249178915 +0200
@@ -39,6 +39,7 @@
 #include <vector>
 #include <iostream>
 #include "gaussian_process_guider.h"
+#include <iomanip>
 
 #include <fstream>
 #include <thread>