Security update for umoci

This update for umoci fixes the following issues:

Update to v0.4.7 (bsc#1184147).

- CVE-2021-29136: Fixed overwriting of host files via malicious layer (bsc#1184147).

This update was imported from the SUSE:SLE-15:Update update project.

Fixed bugs
bnc#1184147
VUL-0: CVE-2021-29136: umoci: malicious layer allows overwriting of host files
Selected Binaries
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