[bug #54730] Add additional valuable example of find -quit

[James Youngman]

Follow-up Comment #5, bug #54730 (project findutils):

Hmm, given that -exec ... ; does not affect the exit status, it is unfortunate
that there is no other way for the user to (directly) affect it.   Viz:

jupiter:~$ find / -exec false \; -o -quit
jupiter:~$ echo $?
0

The most obvious workaround (making use of the fact that the -exec + form does
affect the exit status) is pretty horrible:

jupiter:~$ find / -exec false \; -o \( -exec false {} \+  -quit \) ; echo $?
1

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