Apparently conan's prebuilt package ships without a runtime check for
AVX, crashing yuzu on devices without it.
Reverting this to externals seems to fix it. This wasn't tested on a CPU
without AVX, but it was tested with the following change on Windows:
bcdedit /set xsavedisable 1
master crashes inside opus code with an illegal instruction, this commit
doesn't.
2d09ff644e