patch 8.2.1508: not all debugger commands covered by tests

Problem:    Not all debugger commands covered by tests.
Solution:   Add tests for going up/down in the stack. (Ben Jackson,
            closes #6765)
diff --git a/src/version.c b/src/version.c
index bb1624f..26075ce 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1508,
+/**/
     1507,
 /**/
     1506,