configure: Introduce new output variable to ax_check_python_mako_module.m4

This output variables gives more flexibility for future changes
in autoconf to detect if it is needed to auto-generate files and
check for the auto-generation dependencies.

It is still returning error when Python is not installed.

Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Reviewed-by: Kai Wasserbäch <kai@dev.carbon-project.org>
2 files changed