YJIT: A64: In CPopAll, pop into the register before using MSR

Or else we put garbage into the flags.

Author: XrXr

yjit/src/backend/arm64/mod.rs

@@ -1155,8 +1155,8 @@ impl Assembler
                     let regs = Assembler::get_caller_save_regs();
 
                     // Pop the state/flags register
-                    msr(cb, SystemRegister::NZCV, Self::SCRATCH0);
                     emit_pop(cb, Self::SCRATCH0);
+                    msr(cb, SystemRegister::NZCV, Self::SCRATCH0);
 
                     for reg in regs.into_iter().rev() {
                         emit_pop(cb, A64Opnd::Reg(reg));