build(parallel): register parallel_partition.o in Makefile.Objects

Add parallel_partition.o to OBJS_PARALLEL so the Makefile-based build
links the ParallelPartition implementation, fixing undefined references
to ParallelPartition constructors in driver, esolver_fp, esolver_factory
and parallel_global.

Author: abacus_fixer

source/Makefile.Objects

@@ -774,6 +774,7 @@ OBJS_MODULE_RI=conv_coulomb_pot_k.o\
 OBJS_PARALLEL=parallel_common.o\
     parallel_cell.o\
     parallel_global.o\
+    parallel_partition.o\
     parallel_comm.o\
     parallel_grid.o\
     parallel_kpoints.o\