pgmanage: fix build

The configure script uses the `command` builtin command which is bash
specific while having a "#!/bin/sh" head.

This forces the use nix default shell (bash)

(cherry picked from commit 159a021bd83bc3e1bd385fe89522aea877eea29c)

pkgs/applications/misc/pgmanage/default.nix

@@ -11,6 +11,10 @@ stdenv.mkDerivation rec {
     sha256 = "0kzdq3xl6wyclngq307544yk57vpm10wyklkbgzx649z3pls3kyw";
   };
 
+  patchPhase = ''
+    patchShebangs src/configure
+  '';
+
   buildInputs = [ postgresql openssl ];
 
   meta = with stdenv.lib; {