x11-themes/numix-icon-theme-circle: fix perms

These files should not have been checked in with the permissions in the
submitted patch. I did not catch this problem because I used git apply
and git diff to integrate the changes and didn't see where the mode
changes in the diff.

PR: 255135
Fixes: 0cbfead46e54 x11-themes/numix-icon-theme-circle: Update to 21.04.14