examples: Fix usage of deprecated RPC exports API (#236)

examples/bytecode.py

@@ -15,5 +15,5 @@ rpc.exports = {
 session = frida.attach("Twitter")
 script = session.create_script_from_bytes(bytecode)
 script.load()
-api = script.exports
+api = script.exports_sync
 print("api.list_threads() =>", api.list_threads())

examples/rpc.py

@@ -14,6 +14,6 @@ rpc.exports = {
 """
 )
 script.load()
-api = script.exports
+api = script.exports_sync
 print("api.hello() =>", api.hello())
 api.fail_please()