And yet another emergency fix for #13803 bootstrap issue: Under Solaris, distutils doesn't include bitness in the directory name

Emergency fix for #13803 bootstrap issue: Under Solaris, distutils doesn't include bitness in the directory name

- Actually check the contents of the file created by bdist_dumb.
- Don’t use “RECORD” as filename for non-PEP 376 record file
- Don’t start method name with “_test”, it smells like a disabled test
  method instead of an helper method
- Fix some idioms (assertIn, addCleanup)

Patch by Justin Love.

Patch by Jeff Ramnani.  Tested with -B, -O and -OO.

Patch by Hallvard B Furuseth.

I have tests to add in this file and it’s always nice to start from a
clean base.

instead of the locale encoding.

sdist used to crash with a full traceback dump instead of printing a
nice warning with the faulty line number.

- First, support.fixup_build_ext (already used to set proper
  library_dirs value under Unix shared builds) gains the ability to
  correctly set the debug attribute under Windows debug builds.

- Second, the filename for the extension module gets a _d suffix under
  debug builds.

- Third, the test code properly puts our customized build_ext object
  into an internal dictionary to make sure that the install command will
  later use our object instead of re-creating one.  That’s the downside
  of using low-level APIs in our test code: we have to manually push
  knobs and turn handles that would otherwise be handled behind the
  scenes.

Thanks to Nadeem for the testing.

- First, support.fixup_build_ext (already used to set proper
  library_dirs value under Unix shared builds) gains the ability to
  correctly set the debug attribute under Windows debug builds.

- Second, the filename for the extension module gets a _d suffix under
  debug builds.

- Third, the test code properly puts our customized build_ext object
  into an internal dictionary to make sure that the install command will
  later use our object instead of re-creating one.  That’s the downside
  of using low-level APIs in our test code: we have to manually push
  knobs and turn handles that would otherwise be handled behind the
  scenes.

Thanks to Nadeem for the testing.

Patch by Jeremy Kloth.

Patch by Jeremy Kloth.

I need this to fix the failing test_install.