
To improve portability of the nightly script for BSD,
added the ability to specify the base "tmp" directory
that the nightly script should run in via the variables
CHPL_NIGHTLY_TMPDIR or TMPDIR (the former overrides the
second, and /tmp is used if neither is specified, as it
is currently), and to specify the "make" utility to run
via CHPL_NIGHTLY_MAKE or MAKE ("make" is used if neither
is specified, as it is currently).

John, let me know if this works, or if you find other
problems.

Also, removed a hack that I'd inserted due to an
environment problem I was having on cygwin with cron
jobs.


git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@2381 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

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