platform: do not pass a directory on the command line.
The home directory will be properly set by Device.home_dir.
It was sometimes crashing when opened with no args.
Fixes: #7049
* Comment the brew shenanigans
(And support non-standard brew prefixes, just in case)
* Bump base to pickup https://github.com/koreader/koreader-base/pull/1260
* Handle libsodium, too
Co-authored-by: Martín Fernández <paziusss@gmail.com>
