libffi4 from home:Alexander_Naumov:SLE12 project

需要 SLE 12 GA ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/home:Alexander_Naumov:SLE12/SLE_12_GA/home:Alexander_Naumov:SLE12.repo
zypper refresh
zypper install libffi4