Do not ignore vendor/assets/stylesheets/cartodb.css

.gitignore

@@ -57,6 +57,9 @@ Vagrantfile
 .grunt/*
 vendor/assets/javascripts/cartodb.*
 vendor/assets/stylesheets/cartodb.*
+# cartodb.css is generated by update_cdb make task and is
+# used in cartodb/cartodb/app/views/layouts/application.html.erb
+!vendor/assets/stylesheets/cartodb.css
 public/test_support.csv
 public/test_guess_country.csv
 doc/manual/build