Added L80 footprint
Added footprint for L80 GPS receiver with integrated antenna Datasheet: https://www.quectel.com/UploadImage/Downlad/L80_Hardware_Design_V1.1.pdf
Added footprint for L80 GPS receiver with integrated antenna Datasheet: https://www.quectel.com/UploadImage/Downlad/L80_Hardware_Design_V1.1.pdf