Use ninja to generate dep files for the native build

Summary:
This introduce a python script that is able to generate dep files from ninja.
The script is used to generate a proper dep file for re-running cmake for the native build, but it is generic and can be used for the native targets in the future.

Depends on D5624

Test Plan:

ninja
ninja # Check native build isn't ran again.
touch build.ninja
ninja # Native build runs again.

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D5628