Add 8px and 10px montserrat fonts to build
CSRCS += lv_font.c
CSRCS += lv_font_fmt_txt.c
CSRCS += lv_font_loader.c
+CSRCS += lv_font_montserrat_8.c
+CSRCS += lv_font_montserrat_10.c
CSRCS += lv_font_montserrat_12.c
CSRCS += lv_font_montserrat_14.c
CSRCS += lv_font_montserrat_16.c
