lisa.wlgen.rta: Add newline at end of JSON file
lisa.wlgen.rta: Add newline at end of JSON file

POSIX somewhat requires files to end with a newline char, and not doing so leads
to weird display, like some kind of "%" marker at the end.

ARM-software/lisa,ARM-software/lisa,credp/lisa,credp/lisa,ARM-software/lisa,credp/lisa,credp/lisa,ARM-software/lisa