rename logshipper -> logtap

- it matches the executable name
- it doesn't ship anything anyway, it's just plumbing

pkgs/default.nix

@@ -100,7 +100,7 @@ in
   levitate = callPackage ./levitate { };
   libubootenv = callPackage ./libubootenv { };
   linotify = callPackage ./linotify { };
-  logshipper = callPackage ./logshipper { };
+  logtap = callPackage ./logtap { };
   lualinux = callPackage ./lualinux { };
 
   # we need to build real lzma instead of using xz, because the lzma

pkgs/logtap/default.nix

@@ -2,7 +2,7 @@
   stdenv,
 }:
 stdenv.mkDerivation {
-  name = "logshipper";
+  name = "logtap";
   makeFlags = [ "PREFIX=${placeholder "out"}" ];
   src = ./.;
 }