Also include MKL_THREAD_LIB in link libraries for caffe2::mkl (#89378)
Actually fixes https://github.com/pytorch/audio/issues/2784 for
real; in my previous testing I didn't check if I could import
torchaudio; now torchaudio successfully imports.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/89378
Approved by: https://github.com/soumith