Move memory corruption tests up a directory

test/malloc_object_size.c

@@ -0,0 +1,12 @@
+#include <stdbool.h>
+#include <malloc.h>
+
+#include "test_util.h"
+
+size_t malloc_object_size(void *ptr);
+
+OPTNONE int main(void) {
+    char *p = malloc(16);
+    size_t size = malloc_object_size(p);
+    return size != (SLAB_CANARY ? 24 : 32);
+}