Move log message output(fprintf, puthcar) to target code

Related issue #752

JerryScript-DCO-1.0-Signed-off-by: SaeHie Park saehie.park@samsung.com

tests/unit/test-api.cpp

@@ -737,3 +737,38 @@ main (void)
 
   return 0;
 }
+
+/**
+ * Provide log message to filestream implementation for the engine.
+ */
+int jerry_port_logmsg (FILE* stream, const char* format, ...)
+{
+  va_list args;
+  int count;
+  va_start (args, format);
+  count = vfprintf (stream, format, args);
+  va_end (args);
+  return count;
+}
+
+/**
+ * Provide error message to console implementation for the engine.
+ */
+int jerry_port_errormsg (const char* format, ...)
+{
+  va_list args;
+  int count;
+  va_start (args, format);
+  count = vfprintf (stderr, format, args);
+  va_end (args);
+  return count;
+}
+
+
+/**
+ * Provide output character to console implementation for the engine.
+ */
+int jerry_port_putchar (int c)
+{
+  return putchar (c);
+}