Suggestion: Update to README saying that a libtorch pre-CXX 11 build is required (as of 1.9)?

[skeydan]

Hi,

thanks for the instructive example! I've noticed that the cxx11 ABI libtorch - the one I normally use - does not have a libpytorch_jni.so, so you get the error no pytorch_jni in java.library.path also reported in other issues (maybe for the same reason?) (see e.g. #21)

Maybe update the README to say you need the pre-cxx11 version?