powerpc64 libstdc++

[David Edelsohn]

>>>>> Alan Modra writes:

Alan> I should have mentioned that I checked current glibc sources too.  It's
Alan> wrong to leave these functions in without some changes as they operate
Alan> on "long", yet use "lwarx" and "stwcx.".

	Okay, remove the other functions.

	Somehow I think this would be nicer with _LOAD_LINKED and
_STORE_CONDITONAL macros substituted in the inlined assembly and
conditionally set to the appropriate PowerPC instruction.

David