[VCRUNTIME] Add vcruntime.h and related (mostly empty)

This is for compatibility with some 3rd-party code.

sdk/include/vcruntime/crtdefs.h

@@ -3,7 +3,7 @@
  * This file is part of the w64 mingw-runtime package.
  * No warranty is given; refer to the file DISCLAIMER within this package.
  */
-#include <_mingw.h>
+#include <vcruntime.h>
 #include <specstrings.h>
 
 #ifndef _INC_CRTDEFS

sdk/include/vcruntime/vadefs.h

@@ -10,8 +10,6 @@
 #error Only Win32 target is supported!
 #endif
 
-#include <crtdefs.h>
-
 #undef _CRT_PACKING
 #define _CRT_PACKING 8
 #pragma pack(push,_CRT_PACKING)

sdk/include/vcruntime/vcruntime.h

@@ -0,0 +1,6 @@
+
+#pragma once
+
+#include <_mingw.h>
+#include <sal.h>
+#include <vadefs.h>

sdk/include/vcruntime/vcruntime_new_debug.h

@@ -0,0 +1,2 @@
+
+#pragma once

sdk/include/vcruntime/vcruntime_startup.h

@@ -0,0 +1,9 @@
+
+#pragma once
+
+typedef enum _crt_argv_mode
+{
+    _crt_argv_no_arguments,
+    _crt_argv_unexpanded_arguments,
+    _crt_argv_expanded_arguments,
+} _crt_argv_mode;

sdk/include/vcruntime/vcruntime_string.h

@@ -0,0 +1,4 @@
+
+#pragma once
+
+#include <vcruntime.h>