Put back the undefs that Richard removed. Boost won't build w/o these; specifically the file 'bytes_methods.h' in Apple's python framework defines these.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@265358 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed