Deps: Update SDL3 to v3.4.0

[JordanTheToaster]

Description of Changes

Updates SDL3 from v3.2.26 to v3.4.0.

Rationale behind Changes

Bug fixes new controller support and FFB fixes are all nice to have.

Suggested Testing Steps

Make sure all the usual SDL things work as expected and also check ffmpeg HEVC recording on Linux as that seemed to fail a test for some unknown reason.

Did you use AI to help find, test, or implement this issue or feature?

No

[dreamsyntax]

This PR breaks Hotplug of Dual Sense controllers, uncovered while looking into root cause for Dolphin https://github.com/dolphin-emu/dolphin/pull/13982/files
Interestingly the AppImage directly from CI (without the presumed problematic HINT set at all) can also run into the issue

[refractionpcsx2]

Linking SDL issue for completeness. libsdl-org/SDL#14802

[dreamsyntax]

Just a heads up, I may update that issue since it may not be related to the HINT after all? PCSX2 is strange because it is detecting the controller sometimes, but not consistently like prior builds. Where as for Dolphin it only seems to be broken with that HINT set. Though to be fair, I haven't extensively tested SDL 3.4.0 on Dolphin with it off...

[dreamsyntax]

I have reproduced it 0 times on the flatpak, with the hint set or not. (Over 20 hotplugs).
Is the builder for flatpak really building with SDL 3.4.0? Is there a way i can verify?
Update: I also tested with Dolphin's 2512 flatpak - not reproducible surprisingly.

It's weird its not consistent behavior.
Side note, could someone upload the deps bundle that this PR would push, so I can batch test on Windows?

[TheLastRar]

Side note, could someone upload the deps bundle that this PR would push, so I can batch test on Windows?

You can build the windows deps using the script in /.github/workflows/scripts/windows/build-dependencies.bat

[dreamsyntax]

@refractionpcsx2 I just tested extensively again now on:
Windows (built manually with latest 845bce0 and built deps using above script) - 40/40
AppImage - 40/40
flatpak - 40/40

I think the AppImage not picking it up the few times was unrelated as I've been unable to reproduce it since.

You're probably fine to merge this, and see if anyone else runs into this bug.
Seems its a Dolphin issue and the AppImage case was a fluke

[SternXD]

controllers/audio still work fine