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

tests/debugger/client_source.cmd

@@ -0,0 +1,4 @@
+s
+s
+s
+continue

tests/debugger/client_source.expected

@@ -0,0 +1,9 @@
+Connecting to: localhost:5001
+Stopped at tests/debugger/client_source.js:15
+(jerry-debugger) s
+Stopped at tests/debugger/client_source.js:40
+(jerry-debugger) s
+Stopped at tests/debugger/client_source.js:35 (in test() at line:33, col:1)
+(jerry-debugger) s
+Stopped at tests/debugger/client_source.js:36 (in test() at line:33, col:1)
+(jerry-debugger) continue

tests/debugger/client_source.js

@@ -0,0 +1,40 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+print("client-source-test");
+
+function finish(z) {
+  print("function finish");
+  print("finish: " + z);
+}
+
+function bar(y) {
+  print("function bar");
+  finish(y + "-bar");
+}
+
+function foo(x)
+{
+  print("function foo");
+  bar(x + "-foo");
+}
+
+function test()
+{
+  print("function test");
+  var x = "test";
+  foo(x);
+}
+
+test();