By Marie Mannes and Richa Naidu GDANSK/LONDON (Reuters) – Philip Morris is not considering withdrawing its offer for Swedish Match despite deteriorating global economic conditions and has “options on the table” including holding a majority stake, its CEO told Reuters. Marlboro-maker Philip Morris in May offered to buy the Stockholm-based company in a bet on the fast-growing market for cigarette alternatives. By Swedish law, 90% of Swedish Match shareholders need to approve the offer before Oct. 21, but some have come out against the $16 billion — or 106 SEK per share — bid for one of the wor…