0022972: Eliminate macro definitions that has compiler-provided analogs (WNT and so on)

1) Macro definition WNT replaced by _WIN32 and _MSC_VER for platform and compiler detection accordingly.
2) Macro definition LIN replaced by __linux__ macro.
3) Macro definition DEB replaced by OCCT_DEBUG macro.

src/XmlLDrivers/XmlLDrivers_DocumentStorageDriver.cxx

@@ -380,7 +380,7 @@ Handle(XmlMDF_ADriverTable) XmlLDrivers_DocumentStorageDriver::AttributeDrivers
 #include <sys/timeb.h>
 #include <sys/types.h>
 #include <stdio.h>
-#ifndef WNT
+#ifndef _WIN32
 extern "C" int ftime (struct timeb *tp);
 #endif
 struct timeb  tmbuf0;