python-sip6 from openSUSE:Factory:Staging:Gcc7 project

需要 standard ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/openSUSE:Factory:Staging:Gcc7/standard/openSUSE:Factory:Staging:Gcc7.repo
zypper refresh
zypper install python-sip6