loganalyzer: Fix output binary on darwin (#520943)

pkgs/development/tools/loganalyzer/default.nix

@@ -41,9 +41,17 @@ stdenv.mkDerivation rec {
 
   installFlags = [ "INSTALL_ROOT=$(out)" ];
 
-  postInstall = ''
-    ln -s $out/bin/LogAnalyzer $out/bin/loganalyzer
-  '';
+  postInstall =
+    let
+      outBin =
+        if stdenv.hostPlatform.isDarwin then
+          "LogAnalyzer.app/Contents/MacOS/LogAnalyzer"
+        else
+          "LogAnalyzer";
+    in
+    ''
+      ln -s $out/bin/${outBin} $out/bin/loganalyzer
+    '';
 
   meta = {
     description = "Tool that helps you to analyze your log files by reducing the content with patterns you define";