gitstatus: disable checks for forked libgit2 dep

The libgit2 dep for gitstatus is a heavy fork, for which the original
checkPhase does not work. This commit ensures that it is disabled as
before.

pkgs/applications/version-management/gitstatus/romkatv_libgit2.nix

···
     hash = "sha256-Bm3Gj9+AhNQMvkIqdrTkK5D9vrZ1qq6CS8Wrn9kfKiw=";
   };
 
+  # this is a heavy fork of the original libgit2
+  # the original checkPhase does not work for this fork
+  doCheck = false;
+
   patches = [ ];
 })