Parse __reference_binds_to_temporary
Parse __reference_binds_to_temporary

Also, fix an issue with abstract pack declarators.

Signed-off-by: Roberto Raggi <5b38c5be65ca2d75b92c40e91029e90f276fd4fe@gmail.com>

robertoraggi/cplusplus,robertoraggi/cplusplus,robertoraggi/cplusplus,robertoraggi/cplusplus,robertoraggi/cplusplus,robertoraggi/cplusplus