Updated aiohttp benchmarks with uvloop

tests/performance/aiohttp/simple_server.py

@@ -0,0 +1,17 @@
+# Run with python3 simple_server.py PORT
+
+from aiohttp import web
+import asyncio
+import sys
+import uvloop
+
+loop = uvloop.new_event_loop()
+asyncio.set_event_loop(loop)
+
+async def handle(request):
+    return web.json_response({"test":True})
+
+app = web.Application(loop=loop)
+app.router.add_route('GET', '/', handle)
+
+web.run_app(app, port=sys.argv[1])