GDC Updated to 2.055/1.070

[dsimcha]

== Quote from maarten van damme (maartenvd1994 at gmail.com)'s article
> I hope gdc (for D2) gets included in gcc so I can simply download it from
> synaptic :D

I don't think this will ever be a good solution.  The glacial and centralized
nature of Linux packaging conflicts with the fast-moving nature of D.  For
example, when I write D code I don't make even the slightest effort to support any
compiler/phobos/druntime version other than the latest.  Most of my code would
probably not even compile with a release from 6 months ago.