chromedriver: update homepage

pkgs/development/tools/selenium/chromedriver/default.nix

···
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://code.google.com/p/chromedriver/;
+    homepage = https://sites.google.com/a/chromium.org/chromedriver;
     description = "A WebDriver server for running Selenium tests on Chrome";
     license = licenses.bsd3;
     maintainers = [ maintainers.goibhniu ];