Migrating should also dump the latest schema

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2534 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

railties/lib/tasks/databases.rake

 desc "Migrate the database according to the migrate scripts in db/migrate (only supported on PG/MySQL). A specific version can be targetted with VERSION=x"
 task :migrate => :environment do
   ActiveRecord::Migrator.migrate("db/migrate/", ENV["VERSION"] ? ENV["VERSION"].to_i : nil)
+  Task[:db_schema_dump].invoke
 end
 
 desc "Load fixtures into the current environment's database"