vidalia: fix meta.repositories.git, since torproject only allows https access now

pkgs/tools/security/vidalia/default.nix

···
 
   meta = with stdenv.lib; {
     homepage = https://www.torproject.org/projects/vidalia.html.en;
-    repositories.git = git://git.torproject.org/vidalia;
+    repositories.git = https://git.torproject.org/vidalia;
     description = "a cross-platform graphical controller for the Tor software, built using the Qt framework";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.phreedom ];