base-stats: HDF5 calls with better compatibility

H5Object.getObjName() is added at HDF5 V1.8.13.
As an example, compilation error would be thrown on CentOS 7.
obj.getObjnameByIdx(obj.getId()) would work with older versions.

Change-Id: I104eaac050db7501ab3a1aa3ad6dc1ee8b8d7e22
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/53283
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/src/base/stats/hdf5.cc b/src/base/stats/hdf5.cc
index d5b7f1e..03574b2 100644
--- a/src/base/stats/hdf5.cc
+++ b/src/base/stats/hdf5.cc
@@ -257,7 +257,7 @@
         fspace = H5::DataSpace(rank, dims, max_dims.data());
         try {
             DPRINTF(Stats, "Creating dataset %s in group %s\n",
-                info.name, group.getObjName());
+                info.name, group.getObjnameByIdx(group.getId()));
             data_set = group.createDataSet(info.name,
                 H5::PredType::NATIVE_DOUBLE, fspace, props);
         } catch (const H5::Exception &e) {