patch 8.1.0151: mksession test fails on MS-Windows

Problem:    Mksession test fails on MS-Windows.
Solution:   Always use an argument for :lcd.
diff --git a/src/version.c b/src/version.c
index 3f7eabe..92b6f0a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -790,6 +790,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    151,
+/**/
     150,
 /**/
     149,