community/fdk-aac: includes patent-violating code without patent grant

The community/fdk-aac package is known to include patent-violating code explicitly without a patent grant from its author (who also own the patents), which creates a litigation trap.

This is problematic when linking against GPLv3/Apache-2.0 code, as well as being problematic regarding Fraunhofer IIS potentially suing us/our users.

We should switch to Wim Taymans' fork which removes the patent-violating code.