Revert "When calling openocd from a shell like this:"

This reverts commit e8641695c6

Original premise was wrong. Proper command is "shutdown", not "exit".

Change-Id: I07f5fe0dda9c24abe53628da986bfda0e406bb4a
Signed-off-by: Alex Austin <alex.austin@spectrumdsi.com>
Reviewed-on: http://openocd.zylin.com/757
Tested-by: jenkins
Reviewed-by: Peter Stuge <peter@stuge.se>

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 */