Disable locale detection for writing the default config.ini
At the time of writing, locale support in Serenity is not great. We always returned the "C" locale, which this code interpreted wrong. Since this is just used for writing a default value to the game config (which can be changed later), we just default to English.
Normally, the build system uses one of the compiled binaries to pack assets into `g2.dat`. However, since we cross-compile this binary for Serenity, we can't do this on the host system. Instead, we download the latest Linux build of OpenRCT2 and copy its `g2.dat` into the disk image.