Added SMARC connector
SMARC specification can be downloaded from: https://sget.org/standards/smarc/
Symbols to be used with footprint: kicad-footprints!2850
These symbols were generated using kipart: https://github.com/devbisme/KiPart/
using this source file: SMARC_pin_table2.csv
and the following command line:
kipart -b -w SMARC_pin_table2.csv -o output.lib --annotation_style none -c --scrunch --push 0.0