hydra: fix tarball build, add pre suffix to tarballs

Dependencies

• [2] U2BNO3C5 hydra: fix build job
• [3] FV2M6MOT hydra: use autoconf/-make
• [4] VM3TQZ65 * hydra: make manual.pdf
• [5] T4LLYESZ * Nix expression for building Hydra.
• [6] YQWH4POV * Simplify.
• [*] UQ6K57MS * Include nix-prefetch-svn in the Hydra binary distribution.
• [*] CLXEECMF * Start putting build results in a database.

Change contents

• replacement in configure.ac at line 1
  [3.15951]→[3.15952:15999](∅→∅)
  − AC_INIT([hydra],[0.1],[rob.vermaas@gmail.com])
  [3.15951]

  [3.15999]
  + AC_INIT([hydra],[m4_esyscmd([echo -n $(cat ./version)$VERSION_SUFFIX])])
• edit in release.nix at line 14
  [3.17653]→[3.17653:17676](∅→∅)
  − version = "0.1";
• edit in release.nix at line 16
  [3.17729]

  [3.17729]
  +
• edit in release.nix at line 18
  [3.17782]

  [3.1540]
  +

  + preConfigure = ''

  + # TeX needs a writable font cache.

  + export VARTEXFONTS=$TMPDIR/texfonts

  + '';
• replacement in release.nix at line 40
  [3.1780]→[2.110:165](∅→∅)
  − [ perl makeWrapper libtool dblatex nix unzip ]
  [3.1780]

  [3.1817]
  + [ perl makeWrapper libtool nix unzip nukeReferences ]
• edit in release.nix at line 51
  [3.2286]

  [8.173]
  + nuke-refs $out/share/doc/hydra/manual/manual.pdf
• file addition: version (----------)
  [9.2]
  + 0.1