update dependency-libs for Gitian builds

- Update Boost from 1.50 to 1.53
-- removes the need to build the Chrono lib

- Update OpenSSL from 1.0.1c to 1.0.1e
-- fixes for CVE-2013-0169, CVE-2012-2686 and CVE-2013-0166

- Update Qt from 4.8.3 to 4.8.4

- Update libqrencode from 3.2.0 to 3.4.2
-- Memory leak bug has been fixed and others