Revert "contrib: regenerate the meson contrib file to use local pathes with the tools"

The dependencies to build meson-machinefile/contrib.ini builds some target contribs packages when we only want to get the ini file alongside the native tools.

This fails to build on Android because when using prebuilt contribs the target compiler is not setup (config.mak) since it's not supposed to be used.

This reverts commit 51ff3023.