Fix build mangohud-git and lib32-mangohud-git

Removing Mangoapp line because it was removed from main project on commit: [8bd0b6](https://github.com/flightlessmango/MangoHud/commit/8bd0b6325904f85b7bf523f580dfdb09bc3f6dee) and [3b0a0d](https://github.com/flightlessmango/MangoHud/commit/3b0a0d4c1053dad8794b7ad391c827f946452f28)