old_contents: class x264(Wig):
    git_uri = 'http://git.videolan.org/git/x264.git'
    
    def setup(self):
      self.configure_flags += ['--enable-static']
  
new_contents: class x264(Wig):
    git_uri = 'http://git.videolan.org/git/x264.git'
    
    def setup(self):
      self.configure_flags += ['--enable-static', '--enable-shared']
  
subject: Update x264.py