[AVR] update to 1.6.17

Author: facchinm

hardware/arduino/avr/platform.txt

@@ -6,7 +6,7 @@
 # https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5-3rd-party-Hardware-specification
 
 name=Arduino AVR Boards
-version=1.6.16
+version=1.6.17
 
 # AVR compile variables
 # ---------------------

hardware/package_index_bundled.json

@@ -12,15 +12,15 @@
         {
           "name": "Arduino AVR Boards",
           "architecture": "avr",
-          "version": "1.6.16",
+          "version": "1.6.17",
           "category": "Arduino",
           "help": {
             "online": "http://www.arduino.cc/en/Reference/HomePage"
           },
-          "url": "http://downloads.arduino.cc/cores/avr-1.6.16.tar.bz2",
-          "archiveFileName": "avr-1.6.16.tar.bz2",
-          "checksum": "SHA-256:2e2e7a7b8ec321b62c54237e8cb03384fc434f3692c47a524e23e61df868ed9a",
-          "size": "5011829",
+          "url": "http://downloads.arduino.cc/cores/avr-1.6.17.tar.bz2",
+          "archiveFileName": "avr-1.6.17.tar.bz2",
+          "checksum": "SHA-256:ecf63bb02d8f647f720be64b4bf235e0ca37b3180b90d816cbff1886f6744833",
+          "size": "5011912",
           "boards": [
             {"name": "Arduino Yún"},
             {"name": "Arduino/Genuino Uno"},