decaf-emu from home:xenonpk project

对于 openSUSE Tumbleweed，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:xenonpk/openSUSE_Tumbleweed/home:xenonpk.repo
zypper refresh
zypper install decaf-emu