ART: Fix memcmp16_test typo

Fix trivial issue.

Bug: 28318941
Test: m test-art-host-gtest-memcmp16_test
Change-Id: I3051e2695c51bbf5cdf4a34e5ffd5a6e2432241f
diff --git a/runtime/arch/memcmp16_test.cc b/runtime/arch/memcmp16_test.cc
index 2f3639c..37aad21 100644
--- a/runtime/arch/memcmp16_test.cc
+++ b/runtime/arch/memcmp16_test.cc
@@ -100,7 +100,7 @@
     }
 
     size_t min = count1 < count2 ? count1 : count2;
-    bool fill_same = r.next() % 1 == 1;
+    bool fill_same = r.next() % 2 == 1;
 
     if (fill_same) {
       for (size_t i = 0; i < min; ++i) {