patch 8.2.5110: icon filetype not recognized from the first line

Problem:    Icon filetype not recognized from the first line.
Solution:   Add a check for the first line. (Doug Kearns)
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 5f10aac..6c2343b 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -718,6 +718,7 @@
       \ 'routeros': [['#!/path/rsc']],
       \ 'fish': [['#!/path/fish']],
       \ 'forth': [['#!/path/gforth']],
+      \ 'icon': [['#!/path/icon']],
       \ }
 
 " Various forms of "env" optional arguments.
diff --git a/src/version.c b/src/version.c
index e581f1a..1f38480 100644
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    5110,
+/**/
     5109,
 /**/
     5108,