mesa|mapi: replace _mesa_[v]snprintf with [v]snprintf

MSVC 2015 and newer has perfectly valid snprintf and vsnprintf
implementations, let's just use those.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3024>

src/mapi/glapi/gen/gl_enums.py

@@ -50,6 +50,7 @@ class PrintGlEnums(gl_XML.gl_print_base):
 
 
     def printRealHeader(self):
+        print('#include <stdio.h>')
         print('#include "main/glheader.h"')
         print('#include "main/enums.h"')
         print('#include "util/imports.h"')
@@ -103,7 +104,7 @@ _mesa_enum_to_string(int nr)
    }
    else {
       /* this is not re-entrant safe, no big deal here */
-      _mesa_snprintf(token_tmp, sizeof(token_tmp) - 1, "0x%x", nr);
+      snprintf(token_tmp, sizeof(token_tmp) - 1, "0x%x", nr);
       token_tmp[sizeof(token_tmp) - 1] = '\\0';
       return token_tmp;
    }