libheif from home:sbrabec:heif project

对于 openSUSE Tumbleweed，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:sbrabec:heif/openSUSE_Tumbleweed/home:sbrabec:heif.repo
zypper refresh
zypper install libheif

对于 openSUSE Factory snapshot，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:sbrabec:heif/openSUSE_Factory_snapshot/home:sbrabec:heif.repo
zypper refresh
zypper install libheif

对于 openSUSE Factory，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:sbrabec:heif/openSUSE_Factory/home:sbrabec:heif.repo
zypper refresh
zypper install libheif

对于 15.6，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:sbrabec:heif/15.6/home:sbrabec:heif.repo
zypper refresh
zypper install libheif

对于 15.5，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:sbrabec:heif/15.5/home:sbrabec:heif.repo
zypper refresh
zypper install libheif

对于 15.4，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:sbrabec:heif/15.4/home:sbrabec:heif.repo
zypper refresh
zypper install libheif

对于 SUSE SLE-15-SP4 GA，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:sbrabec:heif/SUSE_SLE-15-SP4_GA/home:sbrabec:heif.repo
zypper refresh
zypper install libheif