[grilo] test-ui: Drop usage of deprecated GTimeVal

[Victor Toso <victortoso src gnome org>]

commit 9c411dbbc58a4dee087644c9986f228504dda338
Author: Victor Toso <me victortoso com>
Date:   Mon Feb 17 09:56:18 2020 +0100

    test-ui: Drop usage of deprecated GTimeVal

 tools/grilo-test-ui/flickr-oauth.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)
---
diff --git a/tools/grilo-test-ui/flickr-oauth.c b/tools/grilo-test-ui/flickr-oauth.c
index 8e847c5..29463ee 100644
--- a/tools/grilo-test-ui/flickr-oauth.c
+++ b/tools/grilo-test-ui/flickr-oauth.c
@@ -268,10 +268,7 @@ flickroauth_authorization_url (const gchar *oauth_token, const gchar *perms)
 inline static gchar *
 get_timestamp (void)
 {
-  GTimeVal tm;
-  g_get_current_time (&tm);
-
-  return g_strdup_printf ("%lu", tm.tv_sec);
+  return g_strdup_printf ("%lu", g_get_real_time() / G_USEC_PER_SEC);
 }
 
 static gchar