Trouble compiling gtkD under linux with gdc

[Howard Berkey]

> [demos/gl/SimpleGL.d]
> buildflags=-I./src -I./srcgl -I./demos -L-L. -L-lSgtkd -L-lSgtkdgl
> -L-lGLU -L-lGL -L-ldl
> 
> [demos/gl/ShapesGL.d]
> buildflags=-I./src -I./srcgl -I./demos -L-L. -L-lSgtkd -L-lSgtkdgl
> -L-lGLU -L-lGL -L-ldl
> 

Note that those buildflags lines should be one line, the web to news reader munged them in my post.