cxxabi.h (__pbase_type_info): Define, based on __pointer_type_info.

cxxabi.h (__pbase_type_info): Define, based on __pointer_type_info.

	* inc/cxxabi.h (__pbase_type_info): Define, based on
	__pointer_type_info.
	(__pointer_type_info): Derive from __pbase_type_info. Adjust.
	(__pointer_to_member_type_info): Likewise.
	* tinfo2.cc (__pbase_type_info::~__pbase_type_info): Implement.
	(__pointer_to_member_type_info::__is_pointer_p): Remove.
	(__pointer_type_info::__do_catch): Rename to ...
	(__pbase_type_info::__do_catch): ... here. Adjust.
	(__pbase_type_info::__pointer_catch): Implement.
	(__pointer_type_info::__pointer_catch): Adjust.
	(__pointer_to_member_type_info::__pointer_catch): Adjust.

From-SVN: r34165