zsh: set LANG and LC_TIME in shell as well, just in case
zsh: set LANG and LC_TIME in shell as well, just in case

As noted in last commit, we have a race where launchd may not set these
variables in time before iTerm launches. So, just in case, set them
(possibly redundantly) here.

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent