biosal_assembly_graph_builder: use thorium_actor_log
biosal_assembly_graph_builder: use thorium_actor_log

[boisvert@bigmem biosal]$ mpiexec -n 4 ./applications/spate_metagenome_assembler/spate -k 33 -threads-per-node 8 ~/dropbox/S.aureus.fasta.gz
[boisvert@bigmem biosal]$ wc -l log
605 log

Signed-off-by: Sébastien Boisvert <1a4d2e25eb5ba040b6ad5779a730a1a8a0ff9bc5@anl.gov>

GeneAssembly/biosal,sebhtml/biosal,sebhtml/biosal,sebhtml/biosal,GeneAssembly/biosal,GeneAssembly/biosal,sebhtml/biosal,GeneAssembly/biosal,sebhtml/biosal,GeneAssembly/biosal,sebhtml/biosal,GeneAssembly/biosal