Upgrading the F.B.I.'s computer system, one of the areas in which he sought an increase, is relevant to combating terrorism, though Mr. Ashcroft did not defend it on that ground.But in his Sept. 10 submission to the budget office, Mr. Ashcroft did not endorse F.B.I. requests for $58 million for 149 new counterterrorism field agents, 200 intelligence analysts and 54 additional translators.Mr. Ashcr