Commits on Apr 11, 2020

1. bpo-39481: fix test_genericalias on Android …

   Android bionic does not implement shm_open/shm_unlink [1]. As a
   result _posixshmem extension does not exist and
   multiprocessing.shared_memory cannot be imported.
   
   0:01:48 load avg: 1.53 [159/421/7] test_genericalias failed
   test test_genericalias crashed -- Traceback (most recent call last):
     File "/data/local/tmp/lib/python3.9/test/libregrtest/runtest.py", line 270, in _runtest_inner
       refleak = _runtest_inner2(ns, test_name)
     File "/data/local/tmp/lib/python3.9/test/libregrtest/runtest.py", line 221, in _runtest_inner2
       the_module = importlib.import_module(abstest)
     File "/data/local/tmp/lib/python3.9/importlib/__init__.py", line 127, in import_module
       return _bootstrap._gcd_import(name[level:], package, level)
     File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
     File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
     File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
     File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
     File "<frozen importlib._bootstrap_external>", line 790, in exec_module
     File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
     File "/data/local/tmp/lib/python3.9/test/test_genericalias.py", line 22, in <module>
       from multiprocessing.shared_memory import ShareableList
     File "/data/local/tmp/lib/python3.9/multiprocessing/shared_memory.py", line 23, in <module>
       import _posixshmem
   ModuleNotFoundError: No module named '_posixshmem'
   
   [1] https://android.googlesource.com/platform/bionic/+/master/docs/status.md

   Chih-Hsuan Yen committed Apr 11, 2020
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