Fixes for 0.0.30

[elad335]

• Fix an optimization miss in SPU LLVM when using GPR barriers.
• Fix TAR serialization for individual files if they need to be processed in more than 1 iteration due to their size.
• Don't block the compression-requesting thread until all bytes are processed and written to file, instead free the thread the moment it can continue execution in order to improve saving performance.
• Fix an infinite loop in compression thread.
• Fix lv2_timer_thread abort
• Fix pad_state_notify_state_change
• Make bf_t<T> warning-friendly by using small integers when possible.
• Add cellPad event when registering LDD pads.
• Do not rely solely on value-inequality in sys_spu, this can cause a theoretical bug when overflows.

[DAOWAce]

Assuming this currently fixes the issue, can it get merged ASAP? Savestates are pretty much completely broken [for me] right now and I cannot get it to save after 10 attempts in a row. Adjusting SPU-compat doesn't fix. Snip:

F {Emu State Capture Thread: ''} SIG: Thread terminated due to fatal error: Narrowing error
(in file D:\a\1\s\rpcs3\util\atomic.hpp:1697[:39], in function wait)
E SYS: Saving savestate failed due to fatal error!
SIG: Thread [Compressed File Writer Thread] is too sleepy. Waiting for it 273369553.555µs already!

Addendum: Before the recent reworks to savestates, it almost always worked but would occasionally crash if saving again after loading without restarting emu, but now it's 99% broken. Had it save once a few days ago, but loading it resulted in a 10FPS black screen.

[elad335]

This is a new issue, I think it is one of the warning fixes