patch 8.2.4081: CodeQL reports problem in if_cscope causing it to fail

Problem:    CodeQL reports problem in if_cscope causing it to fail.
Solution:   Use execvp() instead of execl().  Merge the header file into the
            source file. (Ozaki Kiichi, closes #9519)
diff --git a/src/version.c b/src/version.c
index 0089232..67a258a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4081,
+/**/
     4080,
 /**/
     4079,