Add -show-system-calls; Update runtime for windows_386; Fix some minor bugs

core/os/os_windows.odin

@@ -203,7 +203,9 @@ stderr := get_std_handle(uint(win32.STD_ERROR_HANDLE));
 
 get_std_handle :: proc "contextless" (h: uint) -> Handle {
 	fd := win32.GetStdHandle(win32.DWORD(h));
-	win32.SetHandleInformation(fd, win32.HANDLE_FLAG_INHERIT, 0);
+	when size_of(uintptr) == 8 {
+		win32.SetHandleInformation(fd, win32.HANDLE_FLAG_INHERIT, 0);
+	}
 	return Handle(fd);
 }