[Android] Some xnb files in Fonts folder can't be extract

[Yabuato]

These xnb files in Fonts folder can't be extract:

SmallFont.xnb
SpriteFont1.xnb
tinyFont.xnb
tinyFontBorder.xnb

[LeonBlade]

This is a known issue, I will try to fix it in the future. For clarity, there needs to be ETC1 compression support for these fonts.

[Wyzard256]

This sounds like the same problem as #30, but the fonts in my copy of the game are compressed with DXT3, not ETC1. (But this issue is tagged "Android", so maybe the fonts use a different compression format in that build of the game?)