cupscloudprint from Printing project

需要 openSUSE Tumbleweed ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/Printing/openSUSE_Tumbleweed/Printing.repo
zypper refresh
zypper install cupscloudprint

需要 15.6 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/Printing/15.6/Printing.repo
zypper refresh
zypper install cupscloudprint

需要 SLE 15 SP3 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/Printing/SLE_15_SP3/Printing.repo
zypper refresh
zypper install cupscloudprint

需要 SLE 12 SP5 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/Printing/SLE_12_SP5/Printing.repo
zypper refresh
zypper install cupscloudprint