ppl: 1.0 -> 1.1, add patch to fix current ptrdiff_t build error

I'm updating to 1.1 because that's the version that the patch from
Fedora, which fixes ptrdiff_t build error, applies to.

Removing old patch that doesn't apply anymore. (The patch seems to be
fixing a build error that no longer exist, see
https://bugs.gentoo.org/show_bug.cgi?id=447928.)