[Vulkan] Update the loader to SDK 1.0.68.0

third_party/vulkan/vk_sdk_platform.h

@@ -43,4 +43,27 @@
 
 #endif // _WIN32
 
-#endif // VK_SDK_PLATFORM_H
+// Check for noexcept support using clang, with fallback to Windows or GCC version numbers
+#ifndef NOEXCEPT
+#if defined(__clang__)
+#if __has_feature(cxx_noexcept)
+#define HAS_NOEXCEPT
+#endif
+#else
+#if defined(__GXX_EXPERIMENTAL_CXX0X__) && __GNUC__ * 10 + __GNUC_MINOR__ >= 46
+#define HAS_NOEXCEPT
+#else
+#if defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 190023026 && defined(_HAS_EXCEPTIONS) && _HAS_EXCEPTIONS
+#define HAS_NOEXCEPT
+#endif
+#endif
+#endif
+
+#ifdef HAS_NOEXCEPT
+#define NOEXCEPT noexcept
+#else
+#define NOEXCEPT
+#endif
+#endif
+
+#endif  // VK_SDK_PLATFORM_H