SUSE-SU-2017:0948-1 Security update for ruby

This update for ruby fixes the following issues: Secuirty issues fixed: - CVE-2015-1855: Ruby OpenSSL Hostname Verification bsc926974 - CVE-2015-7551: Unsafe tainted string usage in Fiddle and DL bsc959495 Bugfixes: - fix small mistake in the backport for bsc986630...