crcsync: move array_size to testdepends.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

ccan/crcsync/_info

@@ -80,6 +80,9 @@ int main(int argc, char *argv[])
 
 	if (strcmp(argv[1], "depends") == 0) {
 		printf("ccan/crc\n");
+		return 0;
+	}
+	if (strcmp(argv[1], "testdepends") == 0) {
 		printf("ccan/array_size\n");
 		return 0;
 	}