patch 8.2.3800: when cross compiling the output of "uname" cannot be set

Problem:    When cross compiling the output of "uname" cannot be set. (Ben
            Reeves)
Solution:   Use cache variables. (closes #9338)
diff --git a/src/version.c b/src/version.c
index 56d302e..c39adda 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3800,
+/**/
     3799,
 /**/
     3798,