update submodule version 3.16.4

Signed-off-by: Steve Jeong <steve@how2flow.net>
diff --git a/setup.py b/setup.py
index 84387f4..f151ce7 100644
--- a/setup.py
+++ b/setup.py
@@ -64,7 +64,7 @@
 
 setup(
     name = 'odroid_wiringpi',
-    version = '3.16.2',
+    version = '3.16.4',
     ext_modules = [ _odroid_wiringpi ],
     py_modules = ["odroid_wiringpi"],
     install_requires=[],