framework: add comment for croutien stack layout
framework: add comment for croutien stack layout

ycool/apollo,xiaoxq/apollo,xiaoxq/apollo,xiaoxq/apollo,xiaoxq/apollo,jinghaomiao/apollo,ApolloAuto/apollo,ApolloAuto/apollo,xiaoxq/apollo,ApolloAuto/apollo,xiaoxq/apollo,wanglei828/apollo,wanglei828/apollo,ycool/apollo,jinghaomiao/apollo,jinghaomiao/apollo,wanglei828/apollo,ycool/apollo,ycool/apollo,ApolloAuto/apollo,jinghaomiao/apollo,ApolloAuto/apollo,wanglei828/apollo,wanglei828/apollo,ycool/apollo,jinghaomiao/apollo,wanglei828/apollo,ycool/apollo,jinghaomiao/apollo,ApolloAuto/apollo