build_options.rb: Change a comment
build_options.rb: Change a comment

Rename --default-names to --with-default-names

hanxue/linuxbrew,maxim-belkin/brew,maxim-belkin/brew,rwhogg/brew,Linuxbrew/brew,rwhogg/brew,rwhogg/brew,hanxue/linuxbrew,Linuxbrew/brew,Linuxbrew/brew,Linuxbrew/brew,hanxue/linuxbrew,maxim-belkin/brew