def build_id_of(path)
      File.open(path) { |f| ELFTools::ELFFile.new(f).build_id }
    end
def build_id_of(path)
      File.open(path) { |f| ELFTools::ELFFile.new(f).build_id }
    end
Get the Build ID of target ELF.
 @param [String] path Absolute file path.
 @return [String] Target build id.
 @example
   Helper.build_id_of('/lib/x86_64-linux-gnu/libc-2.23.so')
   #=> '60131540dadc6796cab33388349e6e4e68692053'