eap-ttls: Bump up buffer sizes to quiet warnings

src/eap-ttls.c:766:50: error: ‘Password’ directive output may be truncated writing 8 bytes into a region of size between 1 and 72 [-Werror=format-truncation=]
  snprintf(password_key, sizeof(password_key), "%sPassword", prefix);
                                                  ^~~~~~~~
In file included from /usr/include/stdio.h:862,
                 from src/eap-ttls.c:28:
/usr/include/bits/stdio2.h:64:10: note: ‘__builtin___snprintf_chk’ output between 9 and 80 bytes into a destination of size 72
   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        __bos (__s), __fmt, __va_arg_pack ());
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/eap-ttls.c

@@ -386,7 +386,7 @@ static bool eap_ttls_phase2_non_eap_load_settings(struct phase2_method *phase2,
 						const char *prefix)
 {
 	struct phase2_credentials *credentials;
-	char setting[72];
+	char setting[128];
 
 	credentials = l_new(struct phase2_credentials, 1);
 
@@ -756,8 +756,8 @@ static int eap_ttls_check_tunneled_auth_settings(struct l_settings *settings,
 						struct l_queue **out_missing)
 {
 	const struct eap_secret_info *secret;
-	char identity_key[72];
-	char password_key[72];
+	char identity_key[128];
+	char password_key[128];
 
 	L_AUTO_FREE_VAR(char *, identity);
 	L_AUTO_FREE_VAR(char *, password) = NULL;