fix: empty the app name if it remains indeterminate

[Spacellary]

"Resolves "Revanced Builder Bug In Ubuntu" #615" ty shrihanDev

Merging should at least fix https://github.com/inotia00/rvx-builder/issues/28 for Termux/Node users for the moment until there's an executable hotfix release

@inotia00 Hotfix maybe?

[inotia00]

thank you