Build: C++ headers: Replace PR #366 with a more directed version.

glslang/MachineIndependent/preprocessor/PpTokens.cpp

@@ -85,11 +85,10 @@ NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define snprintf sprintf_s
 #endif
 
-#include <assert.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <ctype.h>
+#include <cassert>
+#include <cstdlib>
+#include <cstring>
+#include <cctype>
 
 #include "PpContext.h"
 #include "PpTokens.h"