target: mbedos5: Allow jerry_port_console and jerry_port_log to be overriden by user code (#1458)

We're building a REPL (as user-space program) on top of mbedos5 target. For this I need to override the jerry_port_console and jerry_port_log functions from the REPL. This commit wraps these functions in an ifndef, so we can define macros to not include these files.

JerryScript-DCO-1.0-Signed-off-by: Jan Jongboom janjongboom@gmail.com

targets/mbedos5/source/jerry_port_mbed.c

@@ -22,6 +22,7 @@
 
 #include "us_ticker_api.h"
 
+#ifndef JSMBED_OVERRIDE_JERRY_PORT_CONSOLE
 /**
  * Provide console message implementation for the engine.
  */
@@ -39,7 +40,9 @@ jerry_port_console (const char *format, /**< format string */
     printf ("\r"); /* add CR for proper display in serial monitors */
   }
 } /* jerry_port_console */
+#endif /* JSMBED_OVERRIDE_JERRY_PORT_CONSOLE */
 
+#ifndef JSMBED_OVERRIDE_JERRY_PORT_LOG
 /**
  * Provide log message implementation for the engine.
  */
@@ -60,6 +63,7 @@ jerry_port_log (jerry_log_level_t level, /**< log level */
     printf ("\r"); /* add CR for proper display in serial monitors */
   }
 } /* jerry_port_log */
+#endif /* JSMBED_OVERRIDE_JERRY_PORT_LOG */
 
 /**
  * Implementation of jerry_port_fatal.