Update start_test to correctly find util/ dir in release tarball.
Update start_test to correctly find util/ dir in release tarball.

In release tarball, start_test is located under examples/ instead of
util/. Update $utildir default to find util/ relative to start_test, even when
start_test is under examples/.

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