When calling openocd from a shell like this:

openocd -f board/sheevaplug.cfg -c init -c exit

the calling shell will believe that openocd exited with an error due to exitval will be non-zero

This is not tested against incomming telnet

Change-Id: I63d15715a7b46f39a7de261a45039f8c3cad7a98
Signed-off-by: Stian Skjelstad <stian@nixia.no>
Reviewed-on: http://openocd.zylin.com/470
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-by: Bill Traynor <wmat@alphatroop.com>
Reviewed-by: Mathias Küster <kesmtp@freenet.de>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>

src/helper/log.h

@@ -138,5 +138,5 @@ extern int debug_level;
  * make no assumptions about what went wrong and try to handle the problem.
  */
 #define ERROR_FAIL						(-4)
-
+#define ERROR_OK_EXIT					(-5)
 #endif	/* LOG_H */