Fix missing includes for >=libstdc++-15.
Upstream bug: https://github.com/ROCm/amdsmi/issues/124
--- a/tests/amd_smi_test/functional/frequencies_read.cc
+++ b/tests/amd_smi_test/functional/frequencies_read.cc
@@ -21,6 +21,7 @@
  */
 
 #include <cstdint>
+#include <iomanip>
 #include <iostream>
 #include <string>
 
--- a/tests/amd_smi_test/functional/hw_topology_read.cc
+++ b/tests/amd_smi_test/functional/hw_topology_read.cc
@@ -23,6 +23,7 @@
 #include <cinttypes>
 #include <cstdint>
 
+#include <iomanip>
 #include <iostream>
 #include <string>
 #include <vector>
--- a/tests/amd_smi_test/functional/sys_info_read.cc
+++ b/tests/amd_smi_test/functional/sys_info_read.cc
@@ -24,6 +24,7 @@
 #include <stddef.h>
 #include <gtest/gtest.h>
 
+#include <iomanip>
 #include <iostream>
 #include <string>
 #include <limits>