krb5: new tag krb5-1.15-beta2

[Tom Yu]

A new lightweight tag "krb5-1.15-beta2" has been created in the krb5
repository for the following commit:

commit 41ef84061fbfa13e18ea0a5bbda2047efbee2e95
Author: Tom Yu <tlyu at mit.edu>
Date:   Mon Nov 14 22:10:38 2016 -0500

    Update for krb5-1.15-beta2