Add source sending feature to the debugger. (#1932)

With this feature the debugger webIDE and the python client can able to send a source code to the debugger while that is running in wait mode.
This feature can be activated with the --debugger-wait-source switch and the debugger will wait for the source messages.
If every message part are received the debugger will continue the exectuion with the initalized options.

JerryScript-DCO-1.0-Signed-off-by: Imre Kiss kissi.szeged@partner.samsung.com

jerry-core/debugger/debugger-ws.h

@@ -63,6 +63,23 @@ typedef struct
   uint8_t size; /**< size of the message */
 } jerry_debugger_send_header_t;
 
+/**
+ * Incoming message: next message of string data.
+ */
+typedef struct
+{
+  uint8_t type; /**< type of the message */
+} jerry_debugger_receive_uint8_data_part_t;
+
+/**
+ * Byte data for evaluating expressions and receiving client source.
+ */
+typedef struct
+{
+  uint32_t uint8_size; /**< total size of the client source */
+  uint32_t uint8_offset; /**< current offset in the client source */
+} jerry_debugger_uint8_data_t;
+
 /**
  * Initialize the header of an outgoing message.
  */
@@ -85,7 +102,7 @@ bool jerry_debugger_accept_connection (void);
 void jerry_debugger_close_connection (void);
 
 bool jerry_debugger_send (size_t data_size);
-bool jerry_debugger_receive (void);
+bool jerry_debugger_receive (jerry_debugger_uint8_data_t **message_data_p);
 
 void jerry_debugger_compute_sha1 (const uint8_t *input1, size_t input1_len,
                                   const uint8_t *input2, size_t input2_len,