Fix source of non-deterministic cython output for try/finally statements #2779
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Hi,
I'm trying to get reproducible builds for my project and found a source of indeterminism in cython.
The __PYX_XDEC_MEMVIEW statements generated for try/finally statements varied per build if there were multiple types of variables to be cleaned up.
This patch sorts the list of free variables before returning it, making this bit of the codegen deterministic.