Security update for libnettle

This update for libnettle fixes the following security issues:

- CVE-2015-8803: Fixed miscomputation bugs in secp-256r1 modulo functions. (bsc#964845)
- CVE-2015-8804: Fixed carry folding bug in x86_64 ecc_384_modp. (bsc#964847)
- CVE-2015-8805: Fixed miscomputation bugs in secp-256r1 modulo functions. (bsc#964849)

This update was imported from the SUSE:SLE-12:Update update project.

Fixed bugs
bnc#964849
VUL-0: CVE-2015-8805: nettle: Miscomputations of elliptic curve scalar multiplications
bnc#964845
CVE-2015-8803: Fixed miscomputation bugs in secp-256r1 modulo functions.
bnc#964847
Fixed carry folding bug in x86_64 ecc_384_modp.
Selected Binaries
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