Keep logical assignment operators in MOZCENTRAL/TESTING-builds

[Snuffleupagus]

Given how recently logical assignment operators support were added to browsers, we're intentionally translating them even in SKIP_BABEL = true builds for the time being.
However, in either MOZCENTRAL or TESTING builds it should be OK to simply leave logical assignment operators intact.

[Snuffleupagus]

/botio unittest

[pdfjsbot]

From: Bot.io (Linux m4)

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Received

Command cmd_unittest from @Snuffleupagus received. Current queue size: 0

Live output at: http://54.67.70.0:8877/ce53ad03a946c3b/output.txt

[pdfjsbot]

From: Bot.io (Windows)

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Received

Command cmd_unittest from @Snuffleupagus received. Current queue size: 0

Live output at: http://3.101.106.178:8877/c444304881dc462/output.txt

[pdfjsbot]

From: Bot.io (Linux m4)

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Failed

Full output at http://54.67.70.0:8877/ce53ad03a946c3b/output.txt

Total script time: 3.69 mins

• Unit Tests: FAILED

[pdfjsbot]

From: Bot.io (Windows)

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Success

Full output at http://3.101.106.178:8877/c444304881dc462/output.txt

Total script time: 4.68 mins

• Unit Tests: Passed

[Snuffleupagus]

/botio integrationtest

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From: Bot.io (Linux m4)

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Command cmd_integrationtest from @Snuffleupagus received. Current queue size: 0

Live output at: http://54.67.70.0:8877/6404cfcf87aba5f/output.txt

[pdfjsbot]

From: Bot.io (Windows)

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Received

Command cmd_integrationtest from @Snuffleupagus received. Current queue size: 0

Live output at: http://3.101.106.178:8877/f1ebfce84792e72/output.txt

[pdfjsbot]

From: Bot.io (Linux m4)

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Success

Full output at http://54.67.70.0:8877/6404cfcf87aba5f/output.txt

Total script time: 2.98 mins

• Integration Tests: Passed

[pdfjsbot]

From: Bot.io (Windows)

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Success

Full output at http://3.101.106.178:8877/f1ebfce84792e72/output.txt

Total script time: 3.92 mins

• Integration Tests: Passed

[timvandermeij]

Looks like a good idea!