codegen: new types: std::mutex, std::condition_variable, size_t, ssize_t, unsigned long

[lethosor]

Partial implementation of DFHack/dfhack#3427

Needed to align enabler on Linux

[github-actions]

The sizes of the following types have changed in this pull request. Please verify that this is intentional. Note that renamed types are not currently detected and will also be listed here.

Type	Platform	Previous size	New size (this PR)	Change
enabler	linux32	904	664	-240
enabler	linux64	1208	1016	-192
gamest	linux32	29556	29552	-4
main_interface_settings	linux32	876	872	-4
unit	linux32	3812	3808	-4
widget_tabs	linux32	92	88	-4

This is an automated comment. Please leave a reply if you think that the above information is incorrect.

[myk002]

In chat, you said that enabler was 1008 bytes. Do you know where the last bit of difference is coming from?

[lethosor]

I was still working on figuring that out. For reference, it looks like these two fields have been deleted in the most recent build I have: https://github.com/Putnam3145/Dwarf-Fortress--libgraphics--/blob/26fd0f49270aea488b8673d49e605c2b783d4c25/g_src/enabler.h#L560C31-L561

(also a uint32 needed to change to a long... actually, an unsigned long, which I should probably add support for)

[lethosor]

Refreshing to hopefully pick up 7f859ce