Fix the test262 timeout on Windows (#4378)

Use the platform independent python threading.Timer instead of the unix only timeout tool.

The timeout error are like the following things:

```
C:\Users\lygstate>timeout -version
Error: The specified timeout (/T) value is invalid. The valid range is from -1 to 99999 seconds.

C:\Users\lygstate>timeout 0 python
Error: invalid syntax. The default option does not allow more than '1' times.
Type "TIMEOUT /?" to learn how to use it.
```

JerryScript-DCO-1.0-Signed-off-by: Yonggang Luo luoyonggang@gmail.com

tools/runners/run-test-suite-test262.py

@@ -173,12 +173,6 @@ def main(args):
         util.set_timezone('Pacific Standard Time')
 
     command = (args.runtime + ' ' + args.engine).strip()
-    if args.es2015 or args.esnext:
-        try:
-            subprocess.check_output(["timeout", "--version"])
-            command = "timeout 5 " + command
-        except subprocess.CalledProcessError:
-            pass
 
     kwargs = {}
     if sys.version_info.major >= 3:

tools/runners/test262-harness.py

@@ -55,6 +55,7 @@ import xml.dom.minidom
 from collections import Counter
 
 import signal
+import threading
 import multiprocessing
 
 #######################################################################
@@ -65,6 +66,10 @@ M_YAML_LIST_PATTERN = re.compile(r"^\[(.*)\]$")
 M_YAML_MULTILINE_LIST = re.compile(r"^ *- (.*)$")
 
 
+# The timeout of each test case
+TEST262_CASE_TIMEOUT = 5
+
+
 def yaml_load(string):
     return my_read_dict(string.splitlines())[1]
 
@@ -595,11 +600,14 @@ class TestCase(object):
             logging.info("exec: %s", str(args))
             process = subprocess.Popen(
                 args,
-                shell=is_windows(),
+                shell=False,
                 stdout=stdout.file_desc,
                 stderr=stderr.file_desc
             )
+            timer = threading.Timer(TEST262_CASE_TIMEOUT, process.kill)
+            timer.start()
             code = process.wait()
+            timer.cancel()
             out = stdout.read()
             err = stderr.read()
         finally: