update submodule version 3.13.6

Signed-off-by: steve.jeong <jkhpro1003@gmail.com>
diff --git a/WiringPi b/WiringPi
index 290c592..7254c4c 160000
--- a/WiringPi
+++ b/WiringPi
@@ -1 +1 @@
-Subproject commit 290c592cef950197c108907209316b8edb064531
+Subproject commit 7254c4c7147a8d235d5e37d8643053b0716835c9
diff --git a/setup.py b/setup.py
index 327098d..eeaf3e8 100644
--- a/setup.py
+++ b/setup.py
@@ -64,7 +64,7 @@
 
 setup(
     name = 'odroid_wiringpi',
-    version = '3.13.5',
+    version = '3.13.6',
     ext_modules = [ _odroid_wiringpi ],
     py_modules = ["odroid_wiringpi"],
     install_requires=[],