add pygamer tinyusb

Author: ladyada

build_platform.py

@@ -90,6 +90,7 @@
     "pybadge" : ["adafruit:samd:adafruit_pybadge_m4:speed=120", "0x55114460"],
     "pybadge_tinyusb" : ["adafruit:samd:adafruit_pybadge_m4:speed=120,usbstack=tinyusb", "0x55114460"],
     "pygamer" : ["adafruit:samd:adafruit_pygamer_m4:speed=120", "0x55114460"],
+    "pygamer_tinyusb" : ["adafruit:samd:adafruit_pygamer_m4:speed=120,usbstack=tinyusb", "0x55114460"],
     "hallowing_m0" : ["adafruit:samd:adafruit_hallowing", "0x68ed2b88"],
     "hallowing_m4" : ["adafruit:samd:adafruit_hallowing_m4:speed=120", "0x55114460"],
     "hallowing_m4_tinyusb" : ["adafruit:samd:adafruit_hallowing_m4:speed=120,usbstack=tinyusb", "0x55114460"],