[v12.x] deps: V8: backport postmortem metadata fixes#30870

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mmarchini wants to merge 4 commits intonodejs:v12.x-stagingfrom

mmarchini:v12.x-backport-postmortem-metadata

Commits on Jan 8, 2020

deps: V8: cherry-pick cc5016e1b702

mmarchini
authored and
MylesBorins
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deps: V8: cherry-pick b38dfaf3a633

mmarchini
authored and
MylesBorins
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Revert "src: update v8abbr.h for V8 7.7"

mmarchini
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MylesBorins
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Revert "test: update postmortem metadata test for V8 7.7"

mmarchini
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MylesBorins
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