fix(fix-opera.sh): rm ffmpeg.so in root path

[zGrav]

Hey @Ld-Hagen, first off, thank you for this script it truly saved me a headache on getting twitch to work on my opera.

However, I noticed that on one instance that I upgraded, I started to get the error 4000 again and for some reason, on the root of my opera install I had a ffmpeg.so file. I've extended your script to rm it so we use your file in lib-extra instead, and everything seems to be working fine.

Let me know if you're okay with this approach and I'll merge it in, if not, feel free to close.

Cheers!

[Ld-Hagen]

Hi. There's no need to delete the original libffmpeg.so.
You probably have updated to Opera 117 shortly after release, when newer libffmpeg.so wasn't yet available here.
In such case just re-run script few hours later.

[zGrav]

Opera One(version: 116.0.5366.127) is what I'm running, but it could be that I upgraded and something was missing here, I'll close it either way then, thanks!