3.16: Move libcanberra to -sysdeps

Latest release is more than 2 years old
core-deps-3.16: Remove 0pointer.de repo

No module is using it
3.16: Move graphviz to -sysdeps
3.16: Move exempi to -sysdeps
3.16: Move js17 to -sysdeps

This is the old versions and its not going to be upgraded anymore
3.16: Move p11-kit to -sysdeps
3.16: Move poppler to -sysdeps