Merge pull request arduino#211 from GMagician/Fix-AGCM4-total-pins

[AGCM4] Update total pins

Author: ladyada

variants/grand_central_m4/variant.h

@@ -57,7 +57,7 @@ extern "C"
  *----------------------------------------------------------------------------*/
 
 // Number of pins defined in PinDescription array
-#define PINS_COUNT           (94)
+#define PINS_COUNT           (96)
 #define NUM_DIGITAL_PINS     (53)
 #define NUM_ANALOG_INPUTS    (19)
 #define NUM_ANALOG_OUTPUTS   (2)