NixExprs.pm: encode default.nix as utf-8 to fix missing chars/data. (#455)

Dependencies

• [2] L5Z6CN7M In Hydra channels, show only packages matching the user's system type
• [3] UZENK33P * Generate a .tar.bz2 file for the channel Nix expression, since
• [*] LVJKRTIK * Generate a Nix expression for the channel.
• [*] I42G2Z7P * Escape string literals.[

Change contents

• edit in src/lib/Hydra/View/NixExprs.pm at line 8
  [3.123]

  [6.0]
  + use Encode;
• replacement in src/lib/Hydra/View/NixExprs.pm at line 97
  [2.1315]→[2.1315:1378](∅→∅)
  − $tar->add_data("channel/default.nix", $res, {mtime => 1});
  [2.1315]

  [3.207]
  + $tar->add_data("channel/default.nix", encode('utf8',$res), {mtime => 1});