Improve copyright statement (uplift to 0.72.x)

[fmarier]

Uplift of #3828

Approved, please ensure that before merging:

• You have checked CI and the builds, lint, and tests all pass or are not related to your PR.
• You have tested your change on Nightly.
• The PR milestones match the branch they are landing to.

After you merge:

• The associated issue milestone is set to the smallest version that the changes is landed on.

[kjozwiak]

Restarting macOS due to the following failure as per https://ci.brave.com/job/brave-browser-build-pr/job/francois-improve-copyright-statement-3828-0.72.x/1/execution/node/767/log/:

05:32:14  FAILED: Brave Browser Nightly.dSYM.tar.bz2 
05:32:14  python ../../chrome/tools/build/mac/archive_symbols.py Brave\ Browser\ Nightly.dSYM.tar.bz2 AlertNotificationService.dSYM Brave\ Browser\ Nightly\ Framework.dSYM Brave\ Browser\ Nightly.dSYM chrome_crashpad_handler.dSYM libswiftshader_libEGL.dylib.dSYM libswiftshader_libGLESv2.dylib.dSYM Brave\ Browser\ Nightly\ Helper.dSYM Brave\ Browser\ Nightly\ Helper\ \(Renderer\).dSYM Brave\ Browser\ Nightly\ Helper\ \(GPU\).dSYM Brave\ Browser\ Nightly\ Helper\ \(Plugin\).dSYM
05:32:14  Traceback (most recent call last):
05:32:14    File "../../chrome/tools/build/mac/archive_symbols.py", line 31, in <module>
05:32:14      sys.exit(Main(sys.argv[1:]))
05:32:14    File "../../chrome/tools/build/mac/archive_symbols.py", line 19, in Main
05:32:14      return subprocess.check_call(['tar', '-cjf'] + args)
05:32:14    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 540, in check_call
05:32:14      raise CalledProcessError(retcode, cmd)
05:32:14  subprocess.CalledProcessError: Command '['tar', '-cjf', 'Brave Browser Nightly.dSYM.tar.bz2', 'AlertNotificationService.dSYM', 'Brave Browser Nightly Framework.dSYM', 'Brave Browser Nightly.dSYM', 'chrome_crashpad_handler.dSYM', 'libswiftshader_libEGL.dylib.dSYM', 'libswiftshader_libGLESv2.dylib.dSYM', 'Brave Browser Nightly Helper.dSYM', 'Brave Browser Nightly Helper (Renderer).dSYM', 'Brave Browser Nightly Helper (GPU).dSYM', 'Brave Browser Nightly Helper (Plugin).dSYM']' returned non-zero exit status -15
05:32:14  ninja: build stopped: interrupted by user.
05:32:15  script returned exit code 143

[kjozwiak]

Restarting macOS again due to the following failure as per https://ci.brave.com/job/brave-browser-build-pr/job/francois-improve-copyright-statement-3828-0.72.x/3/execution/node/371/log/:

15:01:52  [3981/38642] CXX obj/skia/skia_core_and_effects/SkDCubicToQuads.o
15:01:52  ninja: build stopped: subcommand failed.
15:01:52  null
15:01:52  null
15:01:52  npm ERR! code ELIFECYCLE
15:01:52  npm ERR! errno 1
15:01:52  npm ERR! brave@0.72.122 build: `node ./scripts/commands.js build "Release" "--channel=nightly" "--official_build=true" "--skip_signing"`
15:01:52  npm ERR! Exit status 1
15:01:52  npm ERR! 
15:01:52  npm ERR! Failed at the brave@0.72.122 build script.
15:01:52  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
15:01:52  
15:01:52  npm ERR! A complete log of this run can be found in:
15:01:52  npm ERR!     /Users/jenkins/.npm/_logs/2019-11-09T20_01_52_296Z-debug.log

[kjozwiak]

Uplift into 0.72.x approved after deliberating with @brave/uplift-approvers. This fix also uplifted into 0.71.x as per #3958 so we'll need it in the other channels. Both CI/Jenkins and CI/Travis passed after restarting macOS several times.