ruby: bump to 2.4.2
This release contains some security fixes.
CVE-2017-0898: Buffer underrun vulnerability in Kernel.sprintf
CVE-2017-10784: Escape sequence injection vulnerability in the Basic authentication of WEBrick
CVE-2017-14033: Buffer underrun vulnerability in OpenSSL ASN1 decode
CVE-2017-14064: Heap exposure in generating JSON
Multiple vulnerabilities in RubyGems
Update bundled libyaml to version 0.1.7.
And many other bugfix.
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
(cherry picked from commit
699d9bef30df17272b834a6c6bd8d0c5f8bbf1c9)