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

tools/run-tests.py

@@ -218,7 +218,7 @@ def run_jerry_debugger_tests(options):
             break
 
         for test_file in os.listdir(settings.DEBUGGER_TESTS_DIR):
-            if test_file.endswith(".js"):
+            if test_file.endswith(".cmd"):
                 test_case, _ = os.path.splitext(test_file)
                 test_case_path = os.path.join(settings.DEBUGGER_TESTS_DIR, test_case)
                 test_cmd = [