A comment dated from when variables misleadingly named language_list,
script_list and country_list actually held mappings not lists; they've
been renamed to s/list/map/ a while back, so rephrase.
Use a dict-comprehension rather than the somewhat lisp-ier invocation
of the dict constructor on an iterator over pairs.
Change-Id: Ibcb97122434122dbb1dcb0f621aae02b25a4e1fa
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>