patch 8.1.0508: suspend test fails when run by root

Problem:    Suspend test fails when run by root.
Solution:   Accept both '$' and '#' for the prompt. (James McCoy, closes #3590)
diff --git a/src/version.c b/src/version.c
index 28f39d4..1e66b3e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    508,
+/**/
     507,
 /**/
     506,