compiler warning: fix

Fix compiler warning: external definition with no prior declaration

tests/unit/unit1300.c

@@ -23,7 +23,7 @@
 
 #include "llist.h"
 
-struct curl_llist *llist;
+static struct curl_llist *llist;
 
 static void test_curl_llist_dtor(void *key, void *value)
 {

tests/unit/unit1304.c

@@ -23,9 +23,9 @@
 
 #include "netrc.h"
 
-char login[LOGINSIZE];
-char password[PASSWORDSIZE];
-char filename[64];
+static char login[LOGINSIZE];
+static char password[PASSWORDSIZE];
+static char filename[64];
 
 static CURLcode unit_setup(void)
 {