test 500: workaround low timer resolution on Windows

Since the timer resolution is lower, there are actually cases that
the compared values are equal. Therefore we check for previous
timestamps being greater than the current one instead.

tests/libtest/lib500.c

@@ -110,19 +110,19 @@ int test(char *URL)
 
       /* since the timing will always vary we only compare relative differences
          between these 5 times */
-      if(time_namelookup >= time_connect) {
+      if(time_namelookup > time_connect) {
         fprintf(moo, "namelookup vs connect: %f %f\n",
                 time_namelookup, time_connect);
       }
-      if(time_connect >= time_pretransfer) {
+      if(time_connect > time_pretransfer) {
         fprintf(moo, "connect vs pretransfer: %f %f\n",
                 time_connect, time_pretransfer);
       }
-      if(time_pretransfer >= time_starttransfer) {
+      if(time_pretransfer > time_starttransfer) {
         fprintf(moo, "pretransfer vs starttransfer: %f %f\n",
                 time_pretransfer, time_starttransfer);
       }
-      if(time_starttransfer >= time_total) {
+      if(time_starttransfer > time_total) {
         fprintf(moo, "starttransfer vs total: %f %f\n",
                 time_starttransfer, time_total);
       }