patch 8.2.0263: a few new Vim9 messages are not localized

Problem:    A few new Vim9 messages are not localized.
Solution:   Add the gettext wrapper. (Dominique Pelle, closes #5647)
diff --git a/src/vim9execute.c b/src/vim9execute.c
index c31506a..4555748 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -1611,12 +1611,12 @@
     vim_free(fname);
     if (ufunc == NULL)
     {
-	semsg("E1061: Cannot find function %s", eap->arg);
+	semsg(_("E1061: Cannot find function %s"), eap->arg);
 	return;
     }
     if (ufunc->uf_dfunc_idx < 0)
     {
-	semsg("E1062: Function %s is not compiled", eap->arg);
+	semsg(_("E1062: Function %s is not compiled"), eap->arg);
 	return;
     }
     if (ufunc->uf_name_exp != NULL)