re PR ipa/61659 (Extra undefined symbol because of devirtualization)

re PR ipa/61659 (Extra undefined symbol because of devirtualization)

	PR c++/61659
	PR lto/53808
gcc/cp
	* decl2.c (maybe_emit_vtables): Mark all vtable entries if
	devirtualizing.
	* init.c (build_vtbl_address): Don't mark destructor.
	* class.c (finish_struct_1): Add all classes to keyed_classes
	if devirtualizing.
libstdc++-v3/
	* libsupc++/cxxabi.h (class __pbase_type_info): __pointer_catch
	is pure, not inline.

From-SVN: r212174