updated .gitignore for make preprocess target
updated .gitignore for make preprocess target

mozilla/disco,discoproject/disco,ktkt2009/disco,seabirdzh/disco,beni55/disco,ErikDubbelboer/disco,oldmantaiter/disco,beni55/disco,pavlobaron/disco_playground,scrapinghub/disco,pavlobaron/disco_playground,oldmantaiter/disco,beni55/disco,simudream/disco,pooya/disco,seabirdzh/disco,beni55/disco,oldmantaiter/disco,pombredanne/disco,scrapinghub/disco,pombredanne/disco,discoproject/disco,mwilliams3/disco,pooya/disco,mwilliams3/disco,ktkt2009/disco,discoproject/disco,discoproject/disco,pavlobaron/disco_playground,mozilla/disco,ErikDubbelboer/disco,ktkt2009/disco,ktkt2009/disco,scrapinghub/disco,ErikDubbelboer/disco,ktkt2009/disco,mwilliams3/disco,ErikDubbelboer/disco,pooya/disco,scrapinghub/disco,seabirdzh/disco,simudream/disco,pooya/disco,pombredanne/disco,mozilla/disco,seabirdzh/disco,ErikDubbelboer/disco,simudream/disco,mwilliams3/disco,pombredanne/disco,simudream/disco,mozilla/disco,oldmantaiter/disco,pombredanne/disco,discoproject/disco,seabirdzh/disco,oldmantaiter/disco,beni55/disco,mwilliams3/disco,pavlobaron/disco_playground,simudream/disco