port 498ff4ab6a23f510c9874d9d23cb28892e236312 from Pd-l2ork: added wiringPi as a submodule

.gitmodules

@@ -16,3 +16,6 @@
 [submodule "externals/miXed"]
 	path = externals/miXed
 	url = https://github.com/pd-l2ork/miXed.git
+[submodule "l2ork_addons/raspberry_pi/disis_gpio/wiringPi"]
+	path = l2ork_addons/raspberry_pi/disis_gpio/wiringPi
+	url = git@git://git.drogon.net/wiringPi

l2ork_addons/raspberry_pi/disis_gpio/build.sh

 curdir=`pwd`
-git clone git://git.drogon.net/wiringPi
-cd wiringPi/ && git pull && cd wiringPi/ && make static
+cd wiringPi/ && git stash && git pull && cd wiringPi/ && make static
 cd $curdir
 make
 exit 0

wiringPi @ b0a60c33

+Subproject commit b0a60c3302973ca1878d149d61f2f612c8f27fac