cbq: fix find syntax in example

cbq: fix find syntax in example

Without modification, using the example resulted in the following error:

[root@localhost sbin]# cbq restart
find: warning: you have specified the -maxdepth option after a
non-option argument (, but options are not positional (-maxdepth affects
tests specified before it as well as those specified after it).  Please
specify options before other arguments.

find: warning: you have specified the -maxdepth option after a
non-option argument (, but options are not positional (-maxdepth affects
tests specified before it as well as those specified after it).  Please
specify options before other arguments.

**CBQ: failed to compile CBQ configuration!

See also:

 * https://bugzilla.redhat.com/show_bug.cgi?id=539232

Reported-by: Mads Kiilerich <mads@kiilerich.com>
Signed-off-by: Pavel Šimerda <psimerda@redhat.com>