Prevent an unnecessary SQL query for every package in the NixExprs view

Dependencies

• [2] I42G2Z7P * Escape string literals.[
• [3] 32LK6HFV * Escape the outPath in the generated nixexpr.tar.bz2 in channels, because
• [4] LVJKRTIK * Generate a Nix expression for the channel.
• [5] 5YKSN2MJ * Doh.

Change contents

• replacement in src/lib/Hydra/View/NixExprs.pm at line 28
  [3.727]→[2.134:235](∅→∅)
  − $res .= " name = " . escape ($build->resultInfo->releasename or $build->nixname) . ";\n";
  [3.727]

  [2.235]
  + $res .= " name = " . escape ($build->get_column("releasename") or $build->nixname) . ";\n";