AArch64: Critical native support not fully implemented

Missing implementation:

sharedRuntime_aarch64.cpp:
static void check_needs_gc_for_critical_native(MacroAssembler* masm,
                                               int stack_slots,
                                               int total_c_args,
                                               int total_in_args,
                                               int arg_save_area,
                                               OopMapSet* oop_maps,
                                               VMRegPair* in_regs,
                                               BasicType* in_sig_bt) { Unimplemented(); }