AOSA-2017-0003: Update libgit2

Please update your libgit2 package to version 0.24.6.

Several potential security issue was addressed by libgit2 developers, assigned with the following CVE IDs:

CVE-2016-10128, CVE-2016-10129, CVE-2016-10130, CVE-2017-5338, CVE-2017-5339.

Relevant documentation:

• Original announcement
• Original oss-security mailing list post