update submodule version 3.15.3

Signed-off-by: Steve Jeong <steve@how2flow.net>
diff --git a/WiringPi b/WiringPi
index d112664..08ecb29 160000
--- a/WiringPi
+++ b/WiringPi
@@ -1 +1 @@
-Subproject commit d112664e24cd1aacc50f4d649825bf483b1574ca
+Subproject commit 08ecb29832d69369496e03d56d976e6196bd5dfa
diff --git a/setup.py b/setup.py
index c195ade..f8721a4 100644
--- a/setup.py
+++ b/setup.py
@@ -64,7 +64,7 @@
 
 setup(
     name = 'odroid_wiringpi',
-    version = '3.15.2',
+    version = '3.15.3',
     ext_modules = [ _odroid_wiringpi ],
     py_modules = ["odroid_wiringpi"],
     install_requires=[],