add --show_text option to recovery

Change-Id: Ie6c6c920260dfa759fbb15b1f352d6bb0fa7146c
diff --git a/ui.c b/ui.c
index 01a005f..e2b2a44 100644
--- a/ui.c
+++ b/ui.c
@@ -481,6 +481,14 @@
     return visible;
 }
 
+void ui_show_text(int visible)
+{
+    pthread_mutex_lock(&gUpdateMutex);
+    show_text = visible;
+    update_screen_locked();
+    pthread_mutex_unlock(&gUpdateMutex);
+}
+
 int ui_wait_key()
 {
     pthread_mutex_lock(&key_queue_mutex);