message: fix C++ sample in README
diff: @@ -167,14 +167,30 @@ print(binary)
  #include <LIEF/LIEF.hpp>
  int main(int argc, char** argv) {
  - std::unique_ptr<LIEF::ELF::Binary> elf = LIEF::ELF::Parser::parse("/usr/bin/ls");
  + // ELF
  + try {
  + std::unique_ptr<LIEF::ELF::Binary> elf = LIEF::ELF::Parser::parse("/bin/ls");
  std::cout << *elf << std::endl;
  + } catch (const LIEF::exception& err) {
  + std::cerr << err.what() << std::endl;
  + }
  + // PE
  + try {
  std::unique_ptr<LIEF::PE::Binary> pe = LIEF::PE::Parser::parse("C:\\Windows\\explorer.exe");
  std::cout << *pe << std::endl;
  + } catch (const LIEF::exception& err) {
  + std::cerr << err.what() << std::endl;
  + }
  - std::unique_ptr<LIEF::MachO::Binary> macho = LIEF::MachO::Parser::parse("/usr/bin/ls");
  + // Mach-O
  + try {
  + std::unique_ptr<LIEF::MachO::FatBinary> macho = LIEF::MachO::Parser::parse("/bin/ls");
  std::cout << *macho << std::endl;
  + } catch (const LIEF::exception& err) {
  + std::cerr << err.what() << std::endl;
  + }
  +
  return 0;
  }
  