Update bundlescripts to use "set -e" consistently

"set -e" is already inherited here from make.sh, but explicit is always better than implicit (hence the "set -e" in the first place!)

Some scripts had it, some didn't, and they were a little hodge-podge about _where_ in the script it was.  I like to put it right after the shebang as part of the "file pragmas", if you will so that it doesn't get forgotten.  "Standard Bash boilerplate", similar to having `use strict; use warnings;` at the top of a standard Perl boilerplate file. :)

Technically speaking, even the shebang on these files is unnecessary, since they get sourced and not run directly, but it's a good reminder that they're all written in bash for sure IMO. :)