Security update for libssh2_org

This update for libssh2_org fixes the following issues:

- Incorrect upstream fix for CVE-2019-3859 broke public key authentication [bsc#1133528, bsc#1130103]

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

Fixed bugs
bnc#1130103
libssh2-1-1.8.0-4.3.1 : Unable to send userauth-publickey request
bnc#1133528
SLES 15: HANA scale-out installation fails on SLES 15 [SP1]
Selected Binaries
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