http.client: Add example.

http.client/test_client.py

@@ -0,0 +1,9 @@
+from http.client import HTTPConnection
+
+
+conn = HTTPConnection("localhost")
+#conn = HTTPConnection("micropython.org")
+conn.request("GET", "/")
+resp = conn.getresponse()
+print(resp)
+print(resp.read())