CORE: Add fn name to score print

[nsarka]

This PR adds the name of the init function in the score print when debug logging is enabled. It grabs the name using dladdr. If it can't find the symbol, it will show as ?.

I found this useful for my own purposes, so I'm opening this PR in case it might be useful for others as well.

Here is the before-and-after:

Before

       ucc_team.c:471  UCC  INFO  ===== COLL_SCORE_MAP (team_id 32768, size 144) =====
ucc_coll_score_map.c:230  UCC  INFO  Allgather:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..4095}:TL_UCP:10 {4K..inf}:TL_UCP:10
ucc_coll_score_map.c:230  UCC  INFO  Allgatherv:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10
ucc_coll_score_map.c:230  UCC  INFO  Allreduce:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..4095}:TL_UCP:10 {4K..inf}:TL_UCP:10
ucc_coll_score_map.c:230  UCC  INFO  Alltoall:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..18575}:TL_UCP:10 {18576..inf}:TL_UCP:10
ucc_coll_score_map.c:230  UCC  INFO  Alltoallv:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10
ucc_coll_score_map.c:230  UCC  INFO  Barrier:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10
ucc_coll_score_map.c:230  UCC  INFO  Bcast:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..32767}:TL_UCP:10 {32K..inf}:TL_UCP:10
ucc_coll_score_map.c:230  UCC  INFO  Fanin:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10
ucc_coll_score_map.c:230  UCC  INFO  Fanout:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10
ucc_coll_score_map.c:230  UCC  INFO  Gather:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10
ucc_coll_score_map.c:230  UCC  INFO  Gatherv:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10
ucc_coll_score_map.c:230  UCC  INFO  Reduce:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10

After (with UCC_LOG_LEVEL>=DEBUG)

       ucc_team.c:471  UCC  INFO  ===== COLL_SCORE_MAP (team_id 32768, size 144) =====
ucc_coll_score_map.c:230  UCC  INFO  Allgather:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..4095}:TL_UCP:10=ucc_tl_ucp_allgather_knomial_init {4K..inf}:TL_UCP:10=ucc_tl_ucp_allgather_neighbor_init
ucc_coll_score_map.c:230  UCC  INFO  Allgatherv:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10=ucc_tl_ucp_allgatherv_ring_init
ucc_coll_score_map.c:230  UCC  INFO  Allreduce:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..4095}:TL_UCP:10=ucc_tl_ucp_allreduce_knomial_init {4K..inf}:TL_UCP:10=ucc_tl_ucp_allreduce_sra_knomial_init
ucc_coll_score_map.c:230  UCC  INFO  Alltoall:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..18575}:TL_UCP:10=ucc_tl_ucp_alltoall_bruck_init {18576..inf}:TL_UCP:10=ucc_tl_ucp_coll_init
ucc_coll_score_map.c:230  UCC  INFO  Alltoallv:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10=ucc_tl_ucp_alltoallv_hybrid_init
ucc_coll_score_map.c:230  UCC  INFO  Barrier:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10=ucc_tl_ucp_coll_init
ucc_coll_score_map.c:230  UCC  INFO  Bcast:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..32767}:TL_UCP:10=ucc_tl_ucp_bcast_knomial_init {32K..inf}:TL_UCP:10=ucc_tl_ucp_bcast_sag_knomial_init
ucc_coll_score_map.c:230  UCC  INFO  Fanin:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10=ucc_tl_ucp_coll_init
ucc_coll_score_map.c:230  UCC  INFO  Fanout:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10=ucc_tl_ucp_coll_init
ucc_coll_score_map.c:230  UCC  INFO  Gather:
ucc_coll_score_map.c:230  UCC  INFO  	Host: {0..inf}:TL_UCP:10=ucc_tl_ucp_coll_init

[janjust]

much needed - thanks a lot

[artemry-nv]

bot:retest