_lp_runtime/bash: do not hard code _lp_set_prompt
_lp_runtime/bash: do not hard code _lp_set_prompt

Use "$PROMPT_COMMAND" instead.

dtschan/liquidprompt,tsbarnes/liquidprompt,joshuarubin/dotfiles,smadhueagle/liquidprompt,nojhan/liquidprompt,dan-cleinmark/liquidprompt,joshuarubin/dotfiles,dpilone/liquidprompt,joshuarubin/dotfiles,alexprengere/liquidprompt,pkkolos/liquidprompt,jaesivsm/liquidprompt,milouse/liquidprompt,BobHood/liquidprompt,joshuarubin/dotfiles,laurentbardin/liquidprompt