Merge pull request #3923 from bwshockley/Add_dotstar_mini_sam_m4

Add dotstar mini sam m4

Author: ladyada

ports/atmel-samd/boards/mini_sam_m4/mpconfigboard.mk

@@ -15,3 +15,6 @@ LONGINT_IMPL = MPZ
 CIRCUITPY_AUDIOBUSIO = 0
 
 CIRCUITPY_BITBANG_APA102 = 1
+
+#Include these Python libraries in firmware.
+FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_DotStar