hydra/release.nix: use new location for manual.pdf

Dependencies

• [2] QK2OXCKP hydra/release.nix: move manual to tarball build, restore version in store path for tarball build
• [3] UHMUHQMU hydra: fix tarball build, add pre suffix to tarballs
• [4] Z45QO5BP hydra/release.nix: posthook -> postdist
• [*] T4LLYESZ * Nix expression for building Hydra.

Change contents

• replacement in release.nix at line 35
  [2.218]→[2.218:336](∅→∅)
  − echo "doc-pdf manual $out/share/doc/hydra/manual/manual.pdf" >> $out/nix-support/hydra-build-products
  [2.218]

  [3.188]
  + echo "doc-pdf manual $out/manual.pdf" >> $out/nix-support/hydra-build-products