patch 8.1.0348: on Travis the slowest build is run last

Problem:    On Travis the slowest build is run last. (Dominique Pelle)
Solution:   Reorder the build entries.
diff --git a/src/version.c b/src/version.c
index 790cd76..ab77c13 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    348,
+/**/
     347,
 /**/
     346,