Add android cross compiling support by jcfr · Pull Request #321 · python-cmake-buildsystem/python-cmake-buildsystem

It was not effective, and it was visible using Android Studio.

It avoids the need for checking it by running a program on the target
platform.

…piling

They are already present in source releases, so it is possible to ignore
the regeneration step. We do that only when cross-compiling, because it
is not possible to build for both the host and the target with a single
pass of CMake.