Fixed the hang at program termination.  The variable controlling whether it was OK to terminate (_chpl_can_exit) was being initialized to zero (false).  Now, it is initialized to 1 (true), and reset back to zero when threads are created.
Fixed the hang at program termination.  The variable controlling whether it was
OK to terminate (_chpl_can_exit) was being initialized to zero (false).  Now,
it is initialized to 1 (true), and reset back to zero when threads are created.


git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@12295 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

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