python-*: Format `pythonPackages` bindings for 18.09

(cherry picked from commit e79ccc1)

* podofo: fix library linkage on Darwin

Because the library is not yet installed when the tools are build, it does not contain its final store path as its install name. Linking the tools picks up this incorrect install name and needs to be fixed after installing.

(cherry picked from commit 4b1ffa0)

(cherry picked from commit 4eebe20)

(cherry picked from commit 3d8f6b6)

ghc: Sphinx is a build-time dependency

Switch back to original upstream project which is more recent
than the fork we used.

(cherry picked from commit 4ad424f)

(cherry picked from commit d98b080)

/cc @Ericson2314

PR was #46857

This line broke MacOS cross compilation. paxctl cannot be built on
macOS. Maybe it can be fixed, but no reason to break things
unnecessarily.

Regardless, you definitely need to be more careful about backporting.
I think it’s fine to move fast and break things on master but
with release-18.09 we should be more careful. Something like more
automated testing for cross compilation would also be
helpful (hopefully even making it block).

(cherry picked from commit 82feb4b)
Signed-off-by: Domen Kožar <domen@dev.si>

(cherry picked from commit 656ca22)

(cherry picked from commit 8e4d980)

(cherry picked from commit 61452c8)

(cherry picked from commit 24c31d4)

/cc @Ericson2314

PR was #46857

This line broke MacOS cross compilation. paxctl cannot be built on
macOS. Maybe it can be fixed, but no reason to break things
unnecessarily.

Regardless, you definitely need to be more careful about backporting.
I think it’s fine to move fast and break things on master but
with release-18.09 we should be more careful. Something like more
automated testing for cross compilation would also be
helpful (hopefully even making it block).

(cherry picked from commit f9c4075)

…18.09

This gets the partial revert on the common ancestor of master and
release-18.09, easier further devlopment.