message: c++: let PatchAndInstall and have a ctor
diff: @@ -2126,6 +2126,10 @@ def set_lib_id(path, toolkit):
  class PatchAndInstall(drake.Install):
  + def __init__(self, toolkit, *args, **kwargs):
  + super().__init__(*args, **kwargs)
  + self.__toolkit = toolkit
  +
  def get_deps_fix_rpaths(self, path):
  os.chmod(str(path), 0o755)
  if 'dylib' in str(path):
  