Update the debugger to work on Windows (#2684)

Changed the debugger-tcp.c file to include Windows specific
socket handling code and mode user all components are compilable
for Windows.

Added appveyor configuration to build with and without debugger.

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

jerry-port/default/default-io.c

@@ -87,7 +87,7 @@ jerry_port_log (jerry_log_level_t level, /**< message log level */
     va_end (args);
     va_start (args, format);
 
-    char buffer[length + 1];
+    JERRY_VLA (char, buffer, length + 1);
     vsnprintf (buffer, (size_t) length + 1, format, args);
 
     fprintf (stderr, "%s", buffer);