tests/test-api.c: Fix calloc warning

GCC 14.2.1 gives:

test-api.c: In function ‘testAugPreview’:
test-api.c:867:39: error: ‘calloc’ sizes specified with ‘sizeof’ in the earlier argument and not in the later argument [-Werror=calloc-transposed-args]
  867 |             hosts_txt = calloc(sizeof(char),4096);
      |                                       ^~~~
test-api.c:867:39: note: earlier argument should specify number of elements, later size of each element

Signed-off-by: Richard W.M. Jones <[email protected]>

tests/test-api.c

@@ -864,7 +864,7 @@ static void testAugPreview(CuTest *tc) {
     if (asprintf(&etc_hosts_fn,"%s/etc/hosts",root) >=0 ) {
         hosts_fp = fopen(etc_hosts_fn,"r");
         if ( hosts_fp ) {
-            hosts_txt = calloc(sizeof(char),4096);
+            hosts_txt = calloc(4096,sizeof(char));
             if ( hosts_txt ) {
                 readsz = fread(hosts_txt,sizeof(char),4096,hosts_fp);
                 *(hosts_txt+readsz) = '\0';