ruby-macho.gemspec: Change homepage to reflect new repo home
ruby-macho.gemspec: Change homepage to reflect new repo home

Now that ruby-macho is under Homebrew, rubygems should reflect
its new location. This will be updated on the next version push.

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