Security update for rubygem-rack

rubygem-rack was updated to fix one security issue.

This security issue was fixed:
- CVE-2015-3225: Potential Denial of Service Vulnerability in Rack (bsc#934797).

Fixed bugs
bnc#934797
VUL-0: CVE-2015-3225: rubygem-rack: Potential Denial of Service Vulnerability in Rack
Selected Binaries
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