FEXCore: steam hangs at startup with one thread at 100%  
Howdy!

I am running Steam with FEX-2412 on muvm ~0.1.4~ 0.1.3-r1 on M1 Max.

Steam keeps hanging at startup with one thread running constantly at 100%. I was bisecting the release till merge commit 41c8731443a08141e09ce9941921ca792bdf0bb4 (https://github.com/FEX-Emu/FEX/pull/4188). 9febddefa3b8f8334e3f8d8b9f7cb979358b48c8 works well. 

```bash
/usr/bin/muvm -- FEXInterpreter /home/n3ph/.local/share/fex-steam/steam-launcher/bin_steam.sh -cef-force-occlusion -cef-force-opaque-backgrounds
Using default interface naming scheme 'v255'.
Configuration file /usr/lib/udev/rules.d/93-macsmc-battery-charge-control.rules is marked executable. Please remove executable permission bits. Proceeding anyway.
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Unsupported maximum keycode 708, clipping.
>                   X11 cannot support keycodes above 255.
> Warning:          Could not resolve keysym XF86KbdInputAssistPrevgrou
> Warning:          Could not resolve keysym XF86KbdInputAssistNextgrou
Errors from xkbcomp are not fatal to the X server
/home/n3ph/.local/share/Steam/steam.sh: line 190: DISTRIB_RELEASE: unbound variable
/home/n3ph/.local/share/Steam/steam.sh: line 190: DISTRIB_RELEASE: unbound variable
steam.sh[291]: Running Steam on gentoo  64-bit
/home/n3ph/.local/share/Steam/steam.sh: line 190: DISTRIB_RELEASE: unbound variable
steam.sh[291]: STEAM_RUNTIME is enabled automatically
setup.sh[367]: Steam runtime environment up-to-date!
/home/n3ph/.local/share/Steam/ubuntu12_32/steam-runtime/run.sh: line 85: steam-runtime-identify-library-abi: command not found
run.sh[381]: steam-runtime-identify-library-abi --ldconfig-paths failed, falling back to ldconfig
steam.sh[291]: Couldn't find /home/n3ph/.local/share/Steam/ubuntu12_32/steam-runtime/amd64/usr/bin/srt-logger, logging to console-linux.txt
steam.sh[291]: Can't find 'steam-runtime-check-requirements', continuing anyway
WARNING: setlocale('en_US.UTF-8') failed, using locale: 'C'. International characters may not work.
[2024-12-08 00:44:43] Startup - updater built Jul 16 2024 23:21:18
[2024-12-08 00:44:43] Startup - Steam Client launched with: '/home/n3ph/.local/share/Steam/ubuntu12_32/steam' '-cef-force-occlusion' '-cef-force-opaque-backgrounds'
ILocalize::AddFile() failed to load file "public/steambootstrapper_english.txt".
src/steamexe/updateui_xwin.cpp (1466) : BFileExists( m_FontFileRegular )
src/steamexe/updateui_xwin.cpp (1466) : BFileExists( m_FontFileRegular )
12/08 00:44:43 minidumps folder is set to /tmp/dumps
12/08 00:44:43 Init: Installing breakpad exception handler for appid(steam)/version(1.0)/tid(431)

(hangs here)
```

Any help appreciated.