Can't build on Arch Linux

[1fxe]

Describe the bug Seems to be an issue with the gsutil version used, python2 has been removed and the library six used to managed compatability is not being imported properly

/clang-format, skipping. [Err: Traceback (most recent call last):
  File "/home/filip/Documents/git/java-cef/tools/buildtools/external_bin/gsutil/gsutil_4.68/gsutil/gsutil", line 21, in <module>
    gsutil.RunMain()
  File "/home/filip/Documents/git/java-cef/tools/buildtools/external_bin/gsutil/gsutil_4.68/gsutil/gsutil.py", line 121, in RunMain
    import gslib.__main__
  File "/home/filip/Documents/git/java-cef/tools/buildtools/external_bin/gsutil/gsutil_4.68/gsutil/gslib/__main__.py", line 36, in <module>
    from six.moves import configparser
ModuleNotFoundError: No module named 'six.moves'
]
Downloading 1 files took 0.082395 second(s)

To Reproduce Steps to reproduce the behavior:

1. Follow instructions here https://bitbucket.org/chromiumembedded/java-cef/wiki/BranchesAndBuilding.md`

Expected behavior Should build make file,

Screenshots If applicable, add screenshots to help explain your problem.

Versions (please complete the following information):

• Arch Linux

Additional context Upgrading to 5.30 (the latest version) allows me to compile

https://github.com/chromiumembedded/java-cef/blob/7a13412adc5dd6de4617d948940da398ec36f47e/tools/buildtools/gsutil.py#L37 Change here to 5.30