ppl is marked for autoremoval from testing

[Debian testing autoremoval watch]

ppl 1:1.2-8.1 is marked for autoremoval from testing on 2020-07-31

It is affected by these RC bugs:
959623: ppl: FTBFS: swi_cfli.hh:351:35: error: cannot convert ‘int*’ to ‘size_t*’ {aka ‘long unsigned int*’}