Prior to this patch, libHSrts.so didn't know how to load libffi.so. See issue #1081 for further details.
7c8ba75
The change was supposed to trigger a re-build to fix a broken GHC binary on the Hydra build farm, but now it turns out that the cause for the errors we're seeing isn't GHC: all kinds of (non-Haskell) packages are broken.