kernel-obs-build from home:mwilck:ModularKernel:15.4 project

需要 standard ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/home:mwilck:ModularKernel:15.4/standard/home:mwilck:ModularKernel:15.4.repo
zypper refresh
zypper install kernel-obs-build