Frozen content is not regenerated when files in python_modules change

[jorisplusplus]

During the build of micropython the file frozen_content.c is generated in the build folder. This file contains all frozen modules selected by the manifest. Currently when a file is changed python_modules the changes are not detected by cmake and thus the file is not regenerated.

Expected Behavior

frozen_content is automatically regenerated when python modules change

Workaround

Delete build/frozen_content.c

[brianredbeard]

Affected by micropython/micropython#7753

Resolved in micropython/micropython#10691