`setup.py build` fails on ppc64

[mgorny]

When trying to build python-blosc-1.9.1 on ppc64, setup.py fails due to missing flags key on cpu_info:

python3.7 setup.py build -j 12
Traceback (most recent call last):
  File "setup.py", line 90, in <module>
    '-DDEACTIVATE_SSE2:BOOL=%s' % cmake_bool(('DISABLE_BLOSC_SSE2' in os.environ) or (cpu_info is None) or ('sse2' not in cpu_info['flags'])),
KeyError: 'flags'

Original bug report: https://bugs.gentoo.org/732178

[FrancescAlted]

Thanks for bringing this to our attention. My guess is that the cpuinfo module needs to be updated somehow.