chore: bump libcc (3-1-x)

[electron-bot]

Fixes #18420
Updating libcc reference to latest. Changes since the last roll:

• d84bd5a5 fix: include v8 flags used by electron

mksnapshot comes from the ffmpeg build and needs the same v8 flags used for the static library build

• 55625e1d Merge pull request fix: include v8 flags used by electron in ffmpeg build libchromiumcontent#760 from electron/fix-mksnapshot-v8-flags

fix: include v8 flags used by electron in mksnapshot build

Notes: no-notes

[ckerr]

@jkleinsc pointed out that there are known CI issues in 3-1-x and so @MarshallOfSound suggested using #18283 as a baseline since it's a recent 3-1-x PR that just bumps a package.json dependency. And build-ia32, build-x64, and appveyor: win-x64-testing all fail both PRs.

However appveyor: win-ia32-testing is failing here but passing in #18283. When I compare the logs (18283, 18426) these warnings occur several times here but not in 18283:

ERROR:gpu_process_host.cc(465)]

ERROR:process_win.cc(151)] Unable to terminate process: Access is denied. (0x5)

The two failing tests are:

[00:09:17] not ok 51 app module mixed sandbox option when app.enableMixedSandbox() is called adds --enable-sandbox to render processes created with sandbox: true
[00:09:17]   Error: Timeout of 30000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (C:\projects     \electron-ia32-testing\spec\api-app-spec.js
[00:09:17]       at Test.Runnable._timeoutError (C:\projects\electron-ia32-testing\spec\node_modules\mocha\lib\runnable.js:440:10)
[00:09:17]       at C:\projects\electron-ia32-testing\spec\node_modules\mocha\lib\runnable.js:251:24
[00:09:47] not ok 52 app module mixed sandbox option when the app is launched with --enable-mixed-sandbox adds --enable-sandbox to render processes created wit     h sandbox: true
[00:09:47]   Error: Timeout of 30000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (C:\projects     \electron-ia32-testing\spec\api-app-spec.js
[00:09:47]       at Test.Runnable._timeoutError (C:\projects\electron-ia32-testing\spec\node_modules\mocha\lib\runnable.js:440:10)
[00:09:47]       at C:\projects\electron-ia32-testing\spec\node_modules\mocha\lib\runnable.js:251:24

[codebytere]

those two failures used to happen a lot on that branch iirc 🤔

[ckerr]

To partially rule out flakes: I re-ran both appveyor: win-ia32-testing again for both 18283 and 18426 and had the same results

[jkleinsc]

Windows CI is now passing;

Linux CI the test are passing but it times out trying to shutdown dbusmock, so I think this PR can be merged as is.

[release-clerk]

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