patch 9.0.0508: when the channel test fails there is no clue why

Problem:    When the channel test fails there is no clue why.
Solution:   Add info about the job status. (Ken Takata, closes #11175)
diff --git a/src/version.c b/src/version.c
index 554f8f1..2f545d0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    508,
+/**/
     507,
 /**/
     506,