libsamsung-ipc: currently packaged source is gone

Let's put an up-to-date source into that APKBUILD.

>>> libsamsung-ipc: Fetching libsamsung-ipc-6.0-0003.tar.gz::https://git.replicant.us/replicant/external_libsamsung-ipc/snapshot/external_libsamsung-ipc-replicant-6.0-0003.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (22) The requested URL returned error: 404 (null)
>>> ERROR: libsamsung-ipc: fetch failed

For the v20.05 branch, I'll just delete it, as we don't have a device outside of testing that depends on it.