client/isolate: add --dump_json support to exparchive

client/isolate: add --dump_json support to exparchive

This uses the same flag name and JSON format as the batcharchive
command, but will only ever emit a single digest entry.

R=mcgreevy@chromium.org
BUG=598990
Review-Url: https://codereview.chromium.org/2584323002
Committed: https://github.com/luci/luci-go/commit/11577104592605b1e94476b2bb75385abcc45d8e

[mcgreevy, 2016-12-19 02:33:37]

lgtm

[djd-OOO-Apr2017, 2016-12-19 02:50:28]

The CQ bit was checked by djd@chromium.org

[commit-bot: I haz the power, 2016-12-19 02:50:39]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-19 02:56:30]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1482115828056150, "parent_rev":
"0da66c1a83109bf1973a7646efec7331bb8f5d41", "commit_rev":
"11577104592605b1e94476b2bb75385abcc45d8e"}

[commit-bot: I haz the power, 2016-12-19 02:56:32]

Description was changed from

==========
client/isolate: add --dump_json support to exparchive

This uses the same flag name and JSON format as the batcharchive
command, but will only ever emit a single digest entry.

R=mcgreevy@chromium.org
BUG=598990
==========

to

==========
client/isolate: add --dump_json support to exparchive

This uses the same flag name and JSON format as the batcharchive
command, but will only ever emit a single digest entry.

R=mcgreevy@chromium.org
BUG=598990

Review-Url: https://codereview.chromium.org/2584323002
Committed:
https://github.com/luci/luci-go/commit/11577104592605b1e94476b2bb75385abcc45d8e
==========

[commit-bot: I haz the power, 2016-12-19 02:56:32]

Committed patchset #1 (id:1) as
https://github.com/luci/luci-go/commit/11577104592605b1e94476b2bb75385abcc45d8e