Workarounds needed to run on Manjaro aarch64
(Original title for context: JavaFX not working on Manjaro aarch64)

Similar issue to [this one](https://github.com/haveno-dex/haveno/issues/686) but the same solution won't work.
Azul Java 11 LTS, if I wanted to trust them, isn't available for Linux aarch64, only MacOS.

JavaFX is no longer bundled in JDK from JDK11 onwards, so it should be listed as a separate build & install dependency.

Manjaro aarch64 doesn't have java-openjfx in its repos to satisfy said dependency.

AUR has [a package](https://aur.archlinux.org/packages/java-openjfx) for building openjfx, but it doesn't support an old enough version to work with the JDK 11 that Haveno requires.

I can download and install an old enough JavaFX version from [Gluon](https://gluonhq.com/products/javafx/) for Linux aarch64, but the Haveno binaries produced don't use it, they are looking for OpenJFX instead.