[issue29708] support reproducible Python builds

[Felix C. Stegerman]

Felix C. Stegerman <flx at obfusk.net> added the comment:

Hi!  I've been working on reproducible builds for python-for-android [1,2,3].

Current issues with .pyc files are:

* .pyc files differ depending on whether Python was compiled w/ liblzma-dev installed or not;
* many .pyc files include build paths;
* some .pyc files include paths to system utilities, like `/bin/mkdir` or `/usr/bin/install`, which can differ between systems (e.g. on Debian w/ merged /usr).

[1] https://github.com/kivy/python-for-android/pull/2390
[2] https://lists.reproducible-builds.org/pipermail/rb-general/2021-January/002132.html
[3] https://lists.reproducible-builds.org/pipermail/rb-general/2021-March/002207.html

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<https://bugs.python.org/issue29708>
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