cxxabi.h: New header file.

cxxabi.h: New header file.

	* inc/cxxabi.h: New header file. Define new-abi entry points.
	(__pointer_type_info::target): Rename member to ...
	(__pointer_type_info::type): ... here.
	(__base_class_info::type): Rename member to ...
	(__base_class_info::base): ... here.
	* Make-lang.in (CXX_EXTRA_HEADERS): Add cxxabi.h
	* cp-tree.h (CPTI_ABI): New global tree enumeration.
	(abi_node): New global tree node.
	* decl.c (abi_node): Document.
	(init_decl_processing): Initialize abi_node.
	* rtti.c (build_dynamic_cast_1): Use abi_node for new-abi.
	(get_vmi_pseudo_type_info): Likewise.
	(create_tinfo_types): Likewise.
	(emit_support_tinfos): Likewise.
	* tinfo.h (cxxabi.h): Include for new-abi.
	Move rtti class definitions to new header file.
	* tinfo.cc (abi): Use the namespace.
	(std): Move new abi rtti classes from here ...
	(__cxxabiv1): ... to here.
	* tinfo2.cc (cxxabi.h): Include for new-abi.
	Move rtti class definitions to new header file.
	(std): Move new abi rtti classes from here ...
	(__cxxabiv1): ... to here.
	* inc/typeinfo (__class_type_info): Move into __cxxabiv1
	namespace.

From-SVN: r32669