devel/git-cinnabar: unbreak after 575abbd62626

helper/cinnabar-util.c:230:16: error: no member named 'argv' in 'struct child_process'; did you mean 'args'?

context->proc.argv = argv;
              ^~~~

helper/hg-connect-stdio.c:218:8: error: no member named 'env' in 'struct child_process'

proc->env = local_repo_env;
~~~~  ^