sync: fix find complaint about positional options
sync: fix find complaint about positional options

f90de29 (aur-sync: remove nullglob, 2018-09-06) introduced a use of find
with options in the incorrect order which makes `find` warn about
specifying `-maxdepth` after `-type f`. As "-maxdepth affects tests
specified before it as well as those specified after it."

Correct the order and make find happy again.

AladW/aurutils,AladW/aurutils