[Fluxus] Make fluxus build system respect CXXFLAGS and friends?

[gabor papp]

> As you can see, the solution was to enclose the strings being passed to
> env.Append in square brackets, making them lists. I suspect that the use
> of leading spaces within the offending strings was causing scons to
> place quotes around them. I think these diffs cover the entire usage of
> CCFLAGS within fluxus.
thanks for the patch. it is applied in git.

best,
gabor