Bug: 109748616
Test: ./updater.sh check kotlinc googletest --json_output=/tmp/res.json
Test: out/soong/host/linux-x86/bin/external_updater_notifier \
          --result_file=/tmp/res.json \
          --history ~/updater/history \
          --recipients=hhb@google.com

Change-Id: I27a4c1c2604d38106a08ce3eee1bcd03fdce80d7

Test: update guice
Change-Id: I5e87db69ae8f310b1b00fa59a07bce22c0209edd

Bail out as soon as something goes wrong. Previously if we failed early,
we'd obliterate the existing version anyway.

Don't remove the temporary directory on failure. Otherwise there's no
way to debug a failure.

Bug: N/A
Test: updated external/curl
Change-Id: I3bf055a8ec514c7b76683baee8e1540deb5a3e5d

Bug: 109748616
Test: https://android-review.googlesource.com/c/platform/external/kotlinc/+/699886
Change-Id: I1c28aa256bca6ee5be1ea15f295c5e0fa63526d1