iperf from network:utilities project

需要 openSUSE Factory PowerPC ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/network:utilities/openSUSE_Factory_PowerPC/network:utilities.repo
zypper refresh
zypper install iperf

需要 openSUSE Factory ARM ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/network:utilities/openSUSE_Factory_ARM/network:utilities.repo
zypper refresh
zypper install iperf

需要 openSUSE Factory ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/network:utilities/openSUSE_Factory/network:utilities.repo
zypper refresh
zypper install iperf

需要 16.0 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/network:utilities/16.0/network:utilities.repo
zypper refresh
zypper install iperf

需要 15.6 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/network:utilities/15.6/network:utilities.repo
zypper refresh
zypper install iperf

需要 SLE 12 SP5 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/network:utilities/SLE_12_SP5/network:utilities.repo
zypper refresh
zypper install iperf