message: Fix symlink creation on Windows.
diff: @@ -256,7 +256,13 @@ def build(bld):
  out_clang_dll = os.path.join(bld.path.get_bld().abspath(), 'bin', 'libclang.dll')
  try:
  os.makedirs(os.path.dirname(out_clang_dll))
  - os.symlink(os.path.join(bld.path.get_bld().abspath(), 'lib', name, 'bin', 'libclang.dll'), out_clang_dll)
  + except OSError:
  + pass
  + try:
  + dst = os.path.join(bld.path.get_bld().abspath(), 'lib', name, 'bin', 'libclang.dll')
  + os.symlink(dst, out_clang_dll)
  + except NotImplementedError:
  + shutil.copy(dst, out_clang_dll)
  except OSError:
  pass
  else:
  