gitk from home:darix:apps project

需要 openSUSE Tumbleweed ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/home:darix:apps/openSUSE_Tumbleweed/home:darix:apps.repo
zypper refresh
zypper install gitk

需要 16.0 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/home:darix:apps/16.0/home:darix:apps.repo
zypper refresh
zypper install gitk

需要 15.6 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/home:darix:apps/15.6/home:darix:apps.repo
zypper refresh
zypper install gitk