AOT: implement non-speculative int64 versions of MOD and TRUNCDIV

[mraleph]

Our compiler does not inline / specialize int.% or int.~/ even on platforms where there are short enough instruction sequences.

On ARM64 we should probably always emit sdiv for TRUNCDIV and sdiv+msub for MOD.

On ARM32 we probably emit whatever we emit for IntegerDivision or maybe a call to __aeabi_ldivmod - if that is better.

[aartbik]

This is a blocking AOT optimization of any integer operation chain with % or ~/. We should start supporting this at the very least on 64-bit architectures.

[aartbik]

While working on this I noticed the current VM is not completely accurate for

0x8000000000000000 % -1 
0x8000000000000000 ~/ -1 

(logical outcomes are 0 and 0x8000000000000000) but our 64-bit arch crash with a floating-point exceptions).

[aartbik]

Still getting used to the buttons :-) I obviously hit the "close and comment" rather than just the "comment".