patch 8.1.1006: repeated code in quickfix support

Problem:    Repeated code in quickfix support.
Solution:   Move code to functions. (Yegappan Lakshmanan, closes #4091)
diff --git a/src/version.c b/src/version.c
index 38d5286..054066e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -780,6 +780,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1006,
+/**/
     1005,
 /**/
     1004,