patch 8.2.3388: fnamemodify('path/..', ':p') differs from using 'path/../'

Problem:    fnamemodify('path/..', ':p') differs from using 'path/../'.
Solution:   Include the "/.." in the directory name. (closes #8808)
diff --git a/src/version.c b/src/version.c
index af45ded..7aef272 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3388,
+/**/
     3387,
 /**/
     3386,