Add Eclipse OMR to the big list of stuff

[Eclipse OMR](https://github.com/eclipse/omr) is a C/C++ toolkit for building language runtimes. OMR has a high level JIT compilation library called [JitBuilder](https://developer.ibm.com/open/2016/07/19/jitbuilder-library-and-eclipse-omr-just-in-time-compilers-made-easy/), which is built on OMR's more general compilation framework. We also have a demo VM called [Base9](https://github.com/b9org/b9), and a small tutorial on adding a bytecode (and jitting that bytecode) [here](https://github.com/b9org/b9/blob/master/doc/CASCON2017_SuperchargeALanguageRuntime.pdf)(pdf).

I'd be super happy if you could add our project to the list of C/C++ compilation frameworks.