Make the timeout test more resilient

Since we don't keep timers sorted by deadline but by insertion order,
the test is flaky in slow environments (GHA seemingly). Increase the
timeouts to give it a bigger chance of success.

Author: saghul

tests/test_std.js

@@ -278,10 +278,10 @@ function test_timeout()
 function test_timeout_order()
 {
     var s = "";
-    os.setTimeout(a, 1);
-    os.setTimeout(b, 2);
-    os.setTimeout(d, 5);
-    function a() { s += "a"; os.setTimeout(c, 0); }
+    os.setTimeout(a, 100);
+    os.setTimeout(b, 200);
+    os.setTimeout(d, 500);
+    function a() { s += "a"; os.setTimeout(c, 200); }
     function b() { s += "b"; }
     function c() { s += "c"; }
     function d() { assert(s === "abc"); } // not "acb"