fix build
IMPORTANT!

GFM is switching from Derelict3 to DerelictOrg!

That means you now have to use DerelictOrg-style bindings (relying on package derelict-util).
DerelictOrg packages are link-incompatible with Derelict3 packages.

- If you are an OpenCL user, have a look at derelict_extras-opencl and John Colvin cl4d fork.
  @vuaru: hopefully you can transition, pelase tell otherwise.

- If you still need to be a Derelict3 user, please hang out on http://dblog.aldacron.net/forum/index.php?topic=857.msg1168#new and tell which package is missing in DerelictOrg.