testing/gpsbabel: Assuming maintainership and enable older architectures
Due to the "cutting edge" dependency on qt6 and qt6-qt5compat only 64-bit architectures were enabled as otherwise the dependency would be missing.
Reached out and confirmed with the maintainer of the qt6 and qt5 packages (Bart Ribbers bribbers@disroot.org), that building those on 32-bit, although not impossible, comes with its own problems, and is out of scope for now.
Tested on armv7, not tested on x86, as I have no access, but that'd probably work too.