Use Python 2.7 in the Linux bundle descriptor
Since HTTPS-Everywhere 3.5 is the new stable version and it needs Python 2.7 we need to make sure that is available during bundling the Linux TBBs as well.
Since HTTPS-Everywhere 3.5 is the new stable version and it needs Python 2.7 we need to make sure that is available during bundling the Linux TBBs as well.