Include abort in process.h

Author: mjp41

src/snmalloc/pal/pal_windows.h

@@ -3,8 +3,8 @@
 #include "../aal/aal.h"
 #include "../ds_aal/ds_aal.h"
 #include "pal_timer_default.h"
-#include "process.h"
 #ifdef _WIN32
+#  include "process.h"
 #  ifndef _MSC_VER
 #    include <errno.h>
 #    include <stdio.h>