[Backport wrynose] README.md: provide commit guidelines#2677

Ricardo Salveti (ricardosalveti) merged 4 commits into

qualcomm-linux:wrynosequalcomm-linux/meta-qcom:wrynosefrom

lumag:backport/2652-to-wrynoselumag/meta-qcom:backport/2652-to-wrynoseCopy head branch name to clipboard