perlPackages.TimeDate: fix tests that fail as of 2020

pkgs/development/perl-modules/timedate-2020.patch

@@ -0,0 +1,12 @@
+Index: TimeDate-2.30/t/getdate.t
+===================================================================
+--- TimeDate-2.30.orig/t/getdate.t
++++ TimeDate-2.30/t/getdate.t
+@@ -156,7 +156,7 @@ Jul 22 10:00:00 UTC 2002         ;102733200
+ !;
+ 
+ require Time::Local;
+-my $offset = Time::Local::timegm(0,0,0,1,0,70);
++my $offset = Time::Local::timegm(0,0,0,1,0,1970);
+ 
+ @data = split(/\n/, $data);

pkgs/top-level/perl-packages.nix

@@ -19541,6 +19541,8 @@ let
       url = mirror://cpan/authors/id/G/GB/GBARR/TimeDate-2.30.tar.gz;
       sha256 = "11lf54akr9nbivqkjrhvkmfdgkbhw85sq0q4mak56n6bf542bgbm";
     };
+    # https://rt.cpan.org/Public/Bug/Display.html?id=124509
+    patches = [ ../development/perl-modules/timedate-2020.patch ];
   };
 
   TimeDuration = buildPerlPackage {