C++17ification.

C++17ification!

- Filesystem interaction now uses std::filesystem::path.
- Usage of const char*, std::string have been changed to
  std::string_view where appropriate.
- Usage of printf-style functions changed to use fmt.

src/xenia/cpu/elf_module.h

@@ -2,7 +2,7 @@
  ******************************************************************************
  * Xenia : Xbox 360 Emulator Research Project                                 *
  ******************************************************************************
- * Copyright 2015 Ben Vanik. All rights reserved.                             *
+ * Copyright 2020 Ben Vanik. All rights reserved.                             *
  * Released under the BSD license - see LICENSE in the root for more details. *
  ******************************************************************************
  */
@@ -34,7 +34,7 @@ class ElfModule : public xe::cpu::Module {
   bool is_executable() const override;
   const std::string& path() const { return path_; }
 
-  bool Load(const std::string& name, const std::string& path,
+  bool Load(const std::string_view name, const std::string_view path,
             const void* elf_addr, size_t elf_length);
   bool Unload();