Reduce jailbreak costs, improve jailbreak speed and stability

• Merge kernel read/write request to reduce syscall count.
• Add a kernel memory management for remapping pages and page table entries to reduce kernel memory usage after jailbreak.
• Choose a right size of the fake IOTrap while initializing kexec.
• Use a large number of Mach primitives and other syscalls that affect scheduling to increase stability.
• kexec some hardware codes to flush the cache and TLB instead of waiting for the kpp patch to work.