Fixed bug #64916 finfo testcase contains copyrighted music.

I wasn't able to produce a file causing exactly the same crash.
However the first three seconds of the originally reported
file are  pretty enough to repro bug #64830. That reduces its
size to 72k.
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  Fixed bug #64916 finfo testcase contains copyrighted music.