Figure out how to set the HAVE_ macros when using YARP in JRuby & TruffleRuby

[eregon]

See #979 (comment)
cc @enebo

[kddnewton]

I think this is going to be very much dependent on how you build it in your repository, but you can set them via the -DHAVE_* flags for C compilers. I'm not sure if there's anything to be done on the YARP side here.

[eregon]

Yeah, it's more of a self-reminder than something to change in YARP, and a way to share how it was done when we have a solution. Maybe we can run the ./configure too, that would probably be the nicest.
Maybe there is also a way for autotools to produce a file with all the defs?

[eregon]

I found a way, by reusing YARP's Makefile and the static library it generates: #1051 (comment)