Change lcons(x, NIL) to makeList(x) where appropriate.

src/backend/bootstrap/bootparse.y

src/backend/commands/user.c

src/backend/executor/execJunk.c

src/backend/nodes/copyfuncs.c

src/backend/nodes/list.c

src/backend/nodes/makefuncs.c

src/backend/optimizer/geqo/geqo_eval.c

src/backend/optimizer/path/_deadcode/xfunc.c

src/backend/optimizer/path/pathkeys.c

src/backend/optimizer/prep/prepunion.c

src/backend/parser/gram.y

src/backend/parser/parse_coerce.c