recompiler: add use tracking

[baggins183]

Add use tracking for instructions

Still want to add iterator adaptor for (distinct) users in addition to uses.

[baggins183]

on previous commit I stored uses (inst, index) in a list and used an adaptor to iterate over users.
That was broken though because apparently std:: or boost::unique modify the underlying container.
I changed it so per Inst, users are stored in a list, and nodes in the list hold a user + bitmask of the arg indices that use *this.
Needs a lot more lines of code. I wonder if there's to fix the old way so its simpler.

Still needs boost submodule update

[georgemoralis]

i don't see a pr for it on https://github.com/shadps4-emu/ext-boost :/

[georgemoralis]

@baggins183 if you can pr on boost the neccesary change so we can progress with that pr too

[baggins183]

@georgemoralis here u go boss
shadps4-emu/ext-boost#9

[georgemoralis]

merge you need to update submodule here so we can see if it builds ;D