Incorrect wheel packaging with manylinux2014

Description

When I build mxnet python3 wheel for ppc64le architecture everything seems to work in the build container, but if I install the wheel somewhere else (besides the build container) it throws errors about not finding libraries. Usually those issues are handled via auditwheel repair --plat ... but it seems like the packaging is still wrong for mxnet.

Error Message

>>> import mxnet
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.7/site-packages/mxnet/__init__.py", line 23, in <module>
    from .context import Context, current_context, cpu, gpu, cpu_pinned
  File "/usr/local/lib/python3.7/site-packages/mxnet/context.py", line 23, in <module>
    from .base import classproperty, with_metaclass, _MXClassPropertyMetaClass
  File "/usr/local/lib/python3.7/site-packages/mxnet/base.py", line 356, in <module>
    _LIB = _load_lib()
  File "/usr/local/lib/python3.7/site-packages/mxnet/base.py", line 341, in _load_lib
    lib_path = libinfo.find_lib_path()
  File "/usr/local/lib/python3.7/site-packages/mxnet/libinfo.py", line 73, in find_lib_path
    'List of candidates:\n' + str('\n'.join(dll_path)))
RuntimeError: Cannot find the MXNet library.
List of candidates:
/usr/local/lib/python3.7/site-packages/mxnet/libmxnet.so
/usr/local/lib/python3.7/site-packages/mxnet/../../lib/libmxnet.so
/usr/local/lib/python3.7/site-packages/mxnet/../../build/libmxnet.so
../../../libmxnet.so

This issue happens if i install the wheel in a python:3.7 container via pip3 install mxnet-1.9.0-py3-none-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl

To Reproduce

1 Start build container:

docker run -ti --rm quay.io/pypa/manylinux2014_ppc64le

2 Build script:

# prereqs

yum install -y epel-release centos-release-scl
yum install -y git make ninja-build automake autoconf libtool protobuf-compiler protobuf-devel atlas-devel \
    openblas-devel lapack-devel opencv-devel openssl-devel zeromq-devel

git clone -b 1.9.0 --recursive https://github.com/apache/incubator-mxnet.git mxnet && cd mxnet

# build library
mkdir build && cd build
cmake \
    -DUSE_CUDA=0 \
    -DBLAS=open \
    -DUSE_OPENCV=1 \
    -GNinja \
    ..

ninja install

# build python binding

export MXNET_LIBRARY_PATH=/mxnet/build/libmxnet.so
cd /mxnet/python
/opt/python/cp37-cp37m/bin/python3 setup.py bdist_wheel
auditwheel repair --plat manylinux2014_ppc64le dist/mxnet-1.9.0-py3-none-any.whl

What have you tried to solve it?

Try to deal with the packaging, because libmxnet.so is clearly there, but in another path:

root@ba0e68cb213a:~# find /usr -name "libmxnet.so"
/usr/local/mxnet/libmxnet.so

Environment

I'm building on manylinux2014_ppc64le and using it on "regular" docker.io/python:3.7 container

apache / mxnet