Fix build on 32-bit Windows.

Currently Tor fails with the following error:

    src/test/test_stats.c: In function ‘test_rephist_v3_onions’:
    src/test/test_stats.c:527:22: error: overflow in implicit constant conversion [-Werror=overflow]
       update_approx_time(10101010101);

This patch changes the constant passed to update_approx_time() to avoid
the overflow in the implicit conversion.

See: tor#40199

src/test/test_stats.c

@@ -524,7 +524,9 @@ test_rephist_v3_onions(void *arg)
   /* Initialize the subsystems */
   hs_cache_init();
   rep_hist_hs_stats_init(0);
-  update_approx_time(10101010101);
+
+  /* Change time to 03-01-2002 23:36 UTC */
+  update_approx_time(1010101010);
 
   /* HS stats should be zero here */
   hs_v3_stats = rep_hist_get_hs_v3_stats();