Multiple client source sending feature. (#1957)

Whit this enhancement the debugger can able handle more than one source file across the new source wait mode.
This feature can be used by the python client with the --client-source [paths] switch.
The client will store every source path, when the debugger send a signal about the waiting status, then the client will send one file from the list.

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

tests/debugger/client_source_multiple_2.js

@@ -0,0 +1,21 @@
+// 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("multiple-client-source-test-file-2");
+
+function bar(str) {
+  print("bar");
+  print("str-argument: " + str);
+  crossFoo("called-from-test-file-2");
+}