houdini: make houdini run again

After NixOS#363168, houdini can't run anymore becase of infinite loop in
shell script. `extraInstallCommands` of NixOS#363168 gives such script
`$out/bin/houdini`:

```bash
\#!${stdenv.shell}
exec $out/bin/houdini ${unwrapped}/bin/houdini "$@"
```

This script exec itself infinitely.

pkgs/by-name/ho/houdini/package.nix

@@ -1,7 +1,8 @@
 { lib, stdenv, writeScript, ncurses5, callPackage, buildFHSEnv, unwrapped ? callPackage ./runtime.nix {} }:
 
-buildFHSEnv rec {
-  inherit (unwrapped) pname version;
+buildFHSEnv {
+  pname = "houdini";
+  inherit (unwrapped) version;
 
   # houdini spawns hserver (and other license tools) that is supposed to live beyond the lifespan of houdini process
   dieWithParent = false;
@@ -76,7 +77,8 @@ buildFHSEnv rec {
       "houdini/sbin/sesinetd"
     ];
   in ''
-    WRAPPER=$out/bin/houdini
+    WRAPPER=$(readlink -f $out/bin/houdini)
+    rm $out/bin/houdini
     EXECUTABLES="${lib.concatStringsSep " " executables}"
     for executable in $EXECUTABLES; do
       mkdir -p $out/$(dirname $executable)