update submodule version 3.15.0

Signed-off-by: Steve Jeong <how2soft@gmail.com>
diff --git a/WiringPi b/WiringPi
index 84e3f6d..c5b41f5 160000
--- a/WiringPi
+++ b/WiringPi
@@ -1 +1 @@
-Subproject commit 84e3f6d04dbd30488430e6aec8eec7cf0444e843
+Subproject commit c5b41f53979180f3c6b2cf060112d75ab9848cce
diff --git a/setup.py b/setup.py
index fa28d56..a91aabf 100644
--- a/setup.py
+++ b/setup.py
@@ -64,7 +64,7 @@
 
 setup(
     name = 'odroid_wiringpi',
-    version = '3.14.6',
+    version = '3.15.0',
     ext_modules = [ _odroid_wiringpi ],
     py_modules = ["odroid_wiringpi"],
     install_requires=[],