init: Add wait command and mount wait flag

Change-Id: I6b4c10f8f246095a7fb7342388ec4f6ff97d5733
diff --git a/init/parser.c b/init/parser.c
index b085da8..d5c044d 100644
--- a/init/parser.c
+++ b/init/parser.c
@@ -204,6 +204,7 @@
         break;
     case 'w':
         if (!strcmp(s, "rite")) return K_write;
+        if (!strcmp(s, "ait")) return K_wait;
         break;
     }
     return K_UNKNOWN;