Bug #31060: MySQL CLI parser bug 2

There was a problem when a DELIMITER COMMAND is not the first 
command on the line. I this case an extra line feed was added
to the glob buffer and this was causing subsequent attempts 
to enter this delimiter to fail.
Fixed by not adding a new line to the glob buffer if the 
command being added is a DELIMITER

mysql-test/r/mysql.result

@@ -188,4 +188,8 @@ delimiter
 2
 @z:='1'	@z=database()
 1	NULL
+1
+1
+1
+1
 End of 5.0 tests