[Bug target/127288] missing use of sbfx in a simple example

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127288

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Note this was found in ffmpeg; in the x264 part of the code.  It might be in
the spec version of x264 but I didn't try to see if it is or not.