dev-libs/ppl: new revision to work around broken tests.

dev-libs/ppl: new revision to work around broken tests.

We have a reported test failure on PPC64 that kills the build. There
are a few other problematic tests that have been reported upstream as
well. Since PPL takes so long to build and test, this commit disables
those tests to avoid wasting users' time.

Bug: https://bugs.gentoo.org/717258
Upstream-bug: https://www.cs.unipr.it/mantis/view.php?id=2653
Upstream-bug: https://www.cs.unipr.it/mantis/view.php?id=2120
Upstream-bug: https://www.cs.unipr.it/mantis/view.php?id=1078
Upstream-bug: https://www.cs.unipr.it/mantis/view.php?id=2113
Package-Manager: Portage-2.3.89, Repoman-2.3.20
Signed-off-by: Michael Orlitzky <mjo@gentoo.org>