add topgit to hydra's path

Dependencies

• [2] XCHBOA3S svn -> subversion
• [3] VM3TQZ65 * hydra: make manual.pdf
• [4] U2BNO3C5 hydra: fix build job
• [5] YQWH4POV * Simplify.
• [6] UHMUHQMU hydra: fix tarball build, add pre suffix to tarballs
• [7] FSZJXAHR add sqlite to buildinputs
• [8] HJECG75O hydrA: add some pkgs to buildinputs for tests
• [9] T4LLYESZ * Nix expression for building Hydra.
• [10] X5QBLQDG
• [11] M3A5PZIH hydra: Clarify the dependency on BDW-GC.

Change contents

• replacement in release.nix at line 55
  [3.1780]→[2.0:118](∅→∅)
  − [ perl makeWrapper libtool nix unzip nukeReferences pkgconfig boehmgc sqlite git mercurial subversion bazaar]
  [3.1780]

  [3.1817]
  + [ perl makeWrapper libtool nix unzip nukeReferences pkgconfig boehmgc sqlite git gitAndTools.topGit mercurial subversion bazaar]