Fix ActiveRecord SQLServer adapter to work with UTF8 version of the Ruby::ODBC module

- The UTF8 version does not appear to support multiple statements in a single query. So things like `query; SELECT @@rowcount` do not work

Author: jyothu

lib/active_record/connection_adapters/sqlserver/database_statements.rb

@@ -60,13 +60,11 @@ def internal_exec_sql_query(sql, conn)
         end
 
         def exec_delete(sql, name = nil, binds = [])
-          sql = sql.dup << "; SELECT @@ROWCOUNT AS AffectedRows"
-          super(sql, name, binds)
+          super(sql, name, binds) || super("SELECT @@ROWCOUNT As AffectedRows", "", [])
         end
 
         def exec_update(sql, name = nil, binds = [])
-          sql = sql.dup << "; SELECT @@ROWCOUNT AS AffectedRows"
-          super(sql, name, binds)
+          super(sql, name, binds) || super("SELECT @@ROWCOUNT As AffectedRows", "", [])
         end
 
         def begin_db_transaction