Rework usages/naming of configuration macros [part 3] (#2927)

Reworked the JERRY_DEBUGGER macro to be a 0/1 switch.

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com

docs/05.PORT-API.md

@@ -204,8 +204,8 @@ struct jerry_context_t *jerry_port_get_current_context (void);
  * Makes the process sleep for a given time.
  *
  * Note:
- *      This port function is called by jerry-core when JERRY_DEBUGGER is
- *      defined. Otherwise this function is not used.
+ *      This port function is called by jerry-core when JERRY_DEBUGGER is set to 1.
+ *      Otherwise this function is not used.
  *
  * @param sleep_time milliseconds to sleep.
  */
@@ -351,7 +351,7 @@ jerry_port_get_current_context (void)
 #include <unistd.h>
 #endif /* HAVE_TIME_H */
 
-#ifdef JERRY_DEBUGGER
+#if defined (JERRY_DEBUGGER) && (JERRY_DEBUGGER == 1)
 void jerry_port_sleep (uint32_t sleep_time)
 {
 #ifdef HAVE_TIME_H
@@ -365,5 +365,5 @@ void jerry_port_sleep (uint32_t sleep_time)
 #endif /* HAVE_TIME_H */
   (void) sleep_time;
 } /* jerry_port_sleep */
-#endif /* JERRY_DEBUGGER */
+#endif /* defined (JERRY_DEBUGGER) && (JERRY_DEBUGGER == 1) */
 ```