patch 9.0.1406: ILE RPG files are not recognized

Problem:    ILE RPG files are not recognized.
Solution:   Add patterns for ILE RPG files. (Andreas Louv, issue #12152)
diff --git a/src/version.c b/src/version.c
index 733eb46..1a0a036 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1406,
+/**/
     1405,
 /**/
     1404,