Butte County supervisors asked Gov. George Deukmejian for an additional $8 million in state aid, declaring again that their only alternative would be to file for bankruptcy. Deukmejian's press secretary, Bob Gore, said the Republican governor would have no comment on the county's request until his fiscal advisers review it. Butte's letter is a counter to Deukmejian's proposal last week to give the county $7.45 million in state aid if it cut an additional $6.65 million to close an estimated $14.1-million gap in its proposed $155-million budget. That offer from Deukmejian came just a few hours before the county was scheduled to become the first in the nation to file for bankruptcy.