test/bench: Use Helpers.fixture instead of (missing) constants.
test/bench: Use Helpers.fixture instead of (missing) constants.

Add fat file benchmarking, RPath benchmarking.

woodruffw/ruby-macho,woodruffw/ruby-macho,Homebrew/ruby-macho,Homebrew/ruby-macho,Homebrew/ruby-macho,woodruffw/ruby-macho