Security update for libnettle

This update for libnettle fixes the following issues:

Security issues fixed:

- CVE-2018-16869: Fixed a leaky data conversion exposing a manager oracle (bsc#1118086)

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

Fixed bugs
bnc#1118086
VUL-0: CVE-2018-16869: libnettle: nettle: Leaky data conversion exposing a manager oracle
Selected Binaries
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