patch 8.1.1808: build failure for tiny version

Problem:    Build failure for tiny version.
Solution:   Define ex_eval to ex_ni.  Clean up the ordering a bit.
diff --git a/src/version.c b/src/version.c
index 1c13c06..80e0ce1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -774,6 +774,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1808,
+/**/
     1807,
 /**/
     1806,