buildenv/centos-ermine: update openssl to 1.0.0l.
buildenv/centos-ermine: update Python to 2.7.6.
buildenv/centos-ermine: update glib to 2.38.2.
buildenv/centos-ermine: update dbus to 1.8.0.
buildenv/centos-ermine: update Boost to 1.55.0.
buildenv/centos-ermine: update Qt4 to mumble-developers-qt's HEAD.
buildenv/centos-ermine: add zeroc-patch.mcpp.2.7.2 patch to libmcpp.
buildenv/centos-ermine: update BerkeleyDB to 5.3.28.