Merge pull request #33 from arduino/Wire-fix-missing-include

Adding missing include of 'rtos.h' when compiling Wire library

Author: facchinm

libraries/Wire/Wire.h

@@ -22,6 +22,7 @@
 #include "Print.h"
 #include "drivers/I2C.h"
 #include "drivers/I2CSlave.h"
+#include "rtos.h"
 
 typedef void (*voidFuncPtrParamInt)(int);