README: add usage of runqemu and update several information
README: add usage of runqemu and update several information

Signed-off-by: Kazuhiro Hayashi <d6ab13038406a238a56011921c4eda80a48396fd@toshiba.co.jp>

nghiaht-tsdv/meta-debian,meta-debian/meta-debian,rofehr/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian,tienlee/meta-debian,nghiaht-tsdv/meta-debian,congnt-tsdv/meta-debian,wwright2/meta-debian,tienlee/meta-debian,rofehr/meta-debian,rofehr/meta-debian,congnt-tsdv/meta-debian,wwright2/meta-debian,tienlee/meta-debian,wwright2/meta-debian,tienlee/meta-debian,nghiaht-tsdv/meta-debian,rofehr/meta-debian,congnt-tsdv/meta-debian,nghiaht-tsdv/meta-debian,congnt-tsdv/meta-debian,rofehr/meta-debian,congnt-tsdv/meta-debian,congnt-tsdv/meta-debian,tienlee/meta-debian,wwright2/meta-debian,tienlee/meta-debian,nghiaht-tsdv/meta-debian,meta-debian/meta-debian,rofehr/meta-debian,nghiaht-tsdv/meta-debian,wwright2/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian