make_full_update.sh and make_incremental_update.sh should do a "set -e"
The scripts make_full_update.sh and make_incremental_update.sh from the directory tor-browser.git/tools/update-packaging are missing a set -e, which would make it easier to detect failures. Currently if there is an error in the script, an error is printed in the logs, but the script still exits with 0.
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