Windows build scripts: Bump ant to 1.8.2
Fix build.xml: Remove gluegen config dependency on ../build using build-temp

Fix copy2temp target and issue it before gluegen of cl-if.cfg.

Note: ${project.root}/build cannot be a hard-dependency since
      ${rootrel.build} is configurable hence
      ${project.root}/${rootrel.build}.
Fix windows test scripts (CP, D_ARGS, ..)
Fix Bug 920 - JOCL does not work on windows with 32 bit vm (1/2)

The 'clGetExtensionFunctionAddress' function pointer declaration was faulty,
i.e. using CL_API_ENTRY instead of CL_API_CALL.
CL_API_CALL on windows is defined as '__stdcall' which impacts Window 32bit platforms.

Fixed same issue w/:
  - clCreateContext
  - clBuildProgram

Same issue occurs with _all_ gluegen generated native function wrappers,
i.e. CL_API_CALL is missing in the function declarations!

I will follow-up w/ this fix in a bit ..