Run more iterations of run_field_misc

At count=64, this makes the test take around 1% of the total time.

Author: sipa

src/tests.c

@@ -2467,9 +2467,13 @@ void run_field_misc(void) {
     secp256k1_fe q;
     secp256k1_fe fe5 = SECP256K1_FE_CONST(0, 0, 0, 0, 0, 0, 0, 5);
     int i, j;
-    for (i = 0; i < 5*count; i++) {
+    for (i = 0; i < 1000 * count; i++) {
         secp256k1_fe_storage xs, ys, zs;
-        random_fe(&x);
+        if (i & 1) {
+            random_fe(&x);
+        } else {
+            random_fe_test(&x);
+        }
         random_fe_non_zero(&y);
         /* Test the fe equality and comparison operations. */
         CHECK(secp256k1_fe_cmp_var(&x, &x) == 0);