Change start_test to only generate index.html if a single log directory is specified via CHPL_TEST_PERF_DIR.
Change start_test to only generate index.html if a single log
directory is specified via CHPL_TEST_PERF_DIR.



git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@18883 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

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