Merge pull request adafruit#4140 from FoamyGuy/bitmap_font_path_fix

fix bitmap_font path in display resource gen

Author: dhalbert

tools/gen_display_resources.py

@@ -8,8 +8,8 @@
 import struct
 import sys
 
-sys.path.append("bitmap_font")
-sys.path.append("../../tools/bitmap_font")
+sys.path.insert(0, "bitmap_font")
+sys.path.insert(0, "../../tools/bitmap_font")
 
 from adafruit_bitmap_font import bitmap_font