Squash CHPL_COMM_SUBSTRATE printing for CHPL_COMM=ugni
Squash CHPL_COMM_SUBSTRATE printing for CHPL_COMM=ugni

This commit squashes the printing of CHPL_COMM_SUBSTRATE
when CHPL_COMM is set to ugni (because it isn't a useful
setting in that configuration).



git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@20696 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

CoryMcCartan/chapel,CoryMcCartan/chapel,chizarlicious/chapel,hildeth/chapel,CoryMcCartan/chapel,hildeth/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,chizarlicious/chapel,hildeth/chapel,chizarlicious/chapel,sungeunchoi/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,sungeunchoi/chapel,hildeth/chapel,hildeth/chapel,sungeunchoi/chapel,chizarlicious/chapel,sungeunchoi/chapel,sungeunchoi/chapel,hildeth/chapel,hildeth/chapel,chizarlicious/chapel,chizarlicious/chapel,sungeunchoi/chapel,chizarlicious/chapel,sungeunchoi/chapel,CoryMcCartan/chapel