Path.touch: Create the file if it does not exist.
Path.touch: Create the file if it does not exist.

Signed-off-by: mefyl <a639889f268ed9eb2c872c19b8505dfe978f8da6@gruntech.org>

dra27/jbuilder,janestreet/jbuilder,dra27/jbuilder,janestreet/jbuilder,janestreet/jbuilder,janestreet/jbuilder,janestreet/jbuilder,dra27/jbuilder,janestreet/jbuilder,dra27/jbuilder,dra27/jbuilder,dra27/jbuilder