GitHub actions mysql libstdc++.so.6: cannot allocate memory in static TLS block

[peterjc]

GitHub actions recently broke under Linux, e.g.

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ERROR: Bio.motifs.jaspar.db
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Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.7.12/x64/lib/python3.7/site-packages/MySQLdb/__init__.py", line 18, in <module>
    from . import _mysql
ImportError: /lib/x86_64-linux-gnu/libstdc++.so.6: cannot allocate memory in static TLS block

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "run_tests.py", line 298, in runTest
    module = __import__(name, fromlist=name.split("."))
  File "/home/runner/work/biopython/biopython/build/lib.linux-x86_64-3.7/Bio/motifs/jaspar/db.py", line 62, in <module>
    import MySQLdb as mdb
  File "/opt/hostedtoolcache/Python/3.7.12/x64/lib/python3.7/site-packages/MySQLdb/__init__.py", line 24, in <module>
    version_info, _mysql.version_info, _mysql.__file__
NameError: name '_mysql' is not defined
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Appears to be due to actions/runner-images#4799