MOBILE-2537 readme: Add SauceLabs logo
MOBILE-2537 readme: Add SauceLabs logo

saman222/moodlemobile2,FMCorz/moodlemobile2,moodlehq/moodlemobile2,moodlehq/moodlemobile2,reskit/moodlemobile,reskit/moodlemobile,dpalou/moodlemobile2,saman222/moodlemobile2,moodlehq/moodlemobile2,reskit/moodlemobile,reskit/moodlemobile,saman222/moodlemobile2,moodlehq/moodlemobile2,moodlehq/moodlemobile2,reskit/moodlemobile,moodlehq/moodlemobile2,saman222/moodlemobile2,FMCorz/moodlemobile2,dpalou/moodlemobile2,reskit/moodlemobile,dpalou/moodlemobile2,saman222/moodlemobile2