ARM Linux support

[corbindavenport]

Google doesn't offer official Platform Tools for ARM Linux, but the android-sdk-platform-tools package in the Ubuntu repositories have a somewhat-recent version available for arm64 that might work: https://packages.ubuntu.com/hirsute/android-sdk-platform-tools

Everything that would need to happen:

• [ ] Add a Nexus Tools compile target for ARM Linux
• [ ] Detect ARM Linux and download Ubuntu's binaries instead of the Google zip package
• [ ] Add a warning when the download source is not Google
• [ ] Update the Bash wrapper script to detect ARM Linux and serve the ARM Linux build of Nexus Tools

[corbindavenport]

After looking into this, I'm not sure it's feasible to distribute binaries from Ubuntu/Debian without getting tangled up in dependency hell. Will re-open this if Google ever offers its own package.