Add aur/advancemame, aur/advancemenu

Add unchanged PKGBUILDs from [aur/advancemame](https://aur.archlinux.org/packages/advancemame/) and [aur/advancemenu](https://aur.archlinux.org/packages/advancemenu/). These compile for me without changes on my Raspberry Pi (ARMv6). #421