Apple is planning to build between 40 and 45 million iPhone 3Gs between now and August 2009, according to a BusinessWeek report. Citing a person familiar with the company’s plans, the report says that Apple boosted its production plans — they had expected to build 30 million in 12 months — due to stronger than expected initial sales. To be able to reach that number, the article suggests, Apple will need to continue its international…